Ollie Gallagher fired St Paul’s ahead early when he followed up a blocked shot to net from close range.
Midway through the half Paul Singh made it 2-0 when he nodded home a corner kick from the right.
Matt Rawlings scored his 54th goal of the season; he has played in first, second and third teams this season, to reduce the deficit before the interval.
Shortly afterwards Rawlings, who was a threat throughout, was denied by a good save from Island goalkeeper Andrew Bird and then St Clement’s crossbar was rattled by Robbie Whittaker.
On the hour St Paul’s captain Paul McGinness was fouled in a penalty area and under-18 Island forward Declan Sowney made it 3-1 from the resultant penalty kick.
Rawlings pulled a second back 12 minutes from the end and another fine save by Bird, from substitute Wayne Shales, prevented extra-time.
St Clement: Gavin Smith, Scott Mackie, Will Herdman, Mark Sheldon, Claude Batiste, Jason Kelly, Paul Andrews, Paul Tumelty, Matt Rawlings, Adrian Hick, Jonathan Tuck. Subs used: Wayne Shales, Fabio De Jesus, Andy Le Moine.
St Paul’s: Andrew Bird, Carl Hayes, Robbie Whittaker, Matthew Higgs, Paul Singh, James Hibbs, Glen Durrans, Paul McGinness, Declan Sowney, Ollie Gallagher, Tom Brennan. Subs used: Tom Hebert, Tom Cummins, Aaron Vetier.
Officials: Allister Moore, Chris Gouyette, Mark Fail, Steve Proffitt.
