Some free mittens to give out (4)
I believe the answer is:
emit
'give out' is the definition.
(synonyms)
'some free mittens to' is the wordplay.
'some' says the answer is hidden in the clue (some of the parts of the word are used).
'EMIT' can be found hidden inside 'free mittens to'.
(Other definitions for emit that I've seen before include "Discharge - utter" , "Issue" , "Expel" , "Give off, heat say" , "Let out" .)