Big shots in the film business (6)
I believe the answer is:
stills
'big shots' is the definition.
'stills' can be an answer for 'shots' (both can mean a photograph). I'm unsure of the 'big' bit.
'the film business' is the wordplay.
I cannot really see how this works, but
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is present in the answer.
The remaining letters 'sills' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'in' acts as a link.
Can you help me to learn more?
(Other definitions for stills that I've seen before include "Photos taken from a film" , "Alcohol producers" .)