The Buddies have been hit by a serious injury blow after key striker Jonah Ayunga was ruled out for the rest of the season.
The St Mirren forward has enjoyed a brilliant debut season in the stripes, netting seven times including huge goals against Celtic and Rangers.
The 25-year-old, who joined the Saints in the summer after leaving Morecambe, hobbled off with a knee complaint during the Paisley club's 1-0 win against Motherwell last week.
And while St Mirren were hoping for good news, scans this week revealed the extent of the injury with the striker suffering cruciate knee damage that requires surgery.
That will see him side-lined for at least six months, ruling him out of a return for the remainder of the current campaign.
Gutted Robinson told PA Sport: "Two days ago we got bad news on Jonah. He has done his cruciate ligament so he is going to be a minimum of six months.
"He will have the best care here with Gerry Docherty and the medical team. We are planning when he will have that surgery now and we will get him back fitter and stronger than ever.
"It is a huge blow for us. He was a big part of what we'd done earlier in the season.
"He was excellent when he came on against Motherwell so it is a big blow for the boy himself.
"There was a lot of interest in him from down south as well but he is a strong boy, a strong character and he will come back stronger.
"He will spend a little bit of time with his family, we will start his rehab and, as I say, he will get the best rehab available with Gerry Docherty."
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