St Mirren manager Ian Murray has made 19-year-old forward Jaison McGrath his latest signing on a deal until the end of 2015/16.
The 19-year-old former Hamilton Accies player spent the second half of last season with Celtic, where he was part of their Development League squad.
Saints are seeking their first win of the season in the Ladbrokes Championship when they face Queen of the South at Palmerston on Saturday.
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