Forbear from, though it's a bit of a strain (7)
I believe the answer is:
refrain
'forbear' is the definition.
(I know that forbear can be written as refrain)
'from though it's a bit of a strain' is the wordplay.
I cannot quite see how this works, but
'from' could be 'in' (I've seen this in other clues) and 'in' is found within the answer.
'a' is found in the answer.
'it' could be 'e' ('e' can mean 'electronic' which is similar to 'IT') and 'e' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for refrain that I've seen before include "Stop - chorus" , "Break off" , "Chorus; keep away (from)" , "burden" , "Forbear from chorus?" .)