Toffs properly included among saints? (6)
I believe the answer is:
swells
But I can't explain it at all! Could you help me understand?
(Other definitions for swells that I've seen before include "BEcomes larger in volume, size or intensity" , "VIPs" , "Expands like posh people?" , "Inflates like colloquial toffs" , "Inflates like posh people" .)