Motherwell pulled four points clear in third spot with a hard-fought 1-0 win over Aberdeen.
Liam Donnelly scored the decisive goal in first half stoppage time, heading in Liam Polworth’s precise free-kick delivery.
Aberdeen threw everything at getting an equaliser in the second half, throwing five forwards on in a late salvo, but a dogged Motherwell display saw the visitors hold firm and take the points.
Both sides had limited chances on goal in the first half, with Aberdeen enjoying more of the ball but less of the clear cut chances.
Christopher Long was the first to seriously test the scoresheet, seeing his low shot from a tight angle on the right side beat Joe Lewis, but Shay Logan was alive to stab it away from potentially finding the net.
At the other end, Andrew Considine had the hosts’ biggest chance. Logan’s cross from the right was flicked on by Cosgrove to the back post and into the stride of the left back. But he snatched at his shot, allowing Gillespie to stand tall and steer the ball away with his feet.
Long was then forced off injured after being caught heavily on the edge of the box by Taylor. Referee Willie Collum ruled the ball had been won, but the striker had to go off to be replaced by Christian Ilic.
The Croatian would sting the palms of Joe Lewis with a fierce effort from the edge of the area as the half looked to be wearing to a goalless close.
But the opener would come in first half stoppage time. Polworth’s pinpoint delivery from a free-kick on the right hand side sailed over everyone and into the path of Donnelly at the back post.
The Northern Irishman, recently back from injury, peeled away from everyone to head the ball into the ground and into the left corner of the net to send the travelling support wild and send his side in ahead at the break.
The second half saw Motherwell trying to hit on the counter as Aberdeen threw everything at getting something out of the match.
The hosts caused some concern with balls in from wide areas, but the hard work and determination from everyone in a Motherwell jersey saw the team hold firm and take all three points back down the road.