Pick toffees out of one’s mouth? (6)
I believe the answer is:
choose
'pick' is the definition.
(thesaurus)
'toffees out of one's mouth?' is the wordplay.
'toffees' becomes 'chews' (I've seen this before).
'out of one's mouth?' indicates a 'sounds like' (homophone) clue.
'chews' is a homophone of 'CHOOSE'.
(Other definitions for choose that I've seen before include "Make a selection" , "So echo (anag) - wish" , "Pick, select." , "Vote" , "Select, opt for" .)