St Mirren survived a second half onslaught to pilfer all three points from their trip to Lanarkshire.
The Buddies were totally dominant in the opening 45 minutes, opening the scoring through Jon Obika who calmly slotted home his first goal of the campaign from close range.
Strike partner Junior Morias spurned a hat-trick of chances to make the result safer before the break, with Accies coming back with a vengeance after a likely harsh half-time talk from boss Brian Rice.
Jak Alnwick made some crucial saves to keep his side ahead, with the hosts also guilty of missing numerous chances to level.
Jim Goodwin and his troops were grateful to hear the final whistle blow as the Saints bounced back from their Rangers defeat to make it two wins from three so far this campaign.
