Struggle to capture good clear picture (8)
I believe the answer is:
vignette
'picture' is the definition.
(I know that vignette is a type of picture)
'struggle to capture good clear' is the wordplay.
'struggle' becomes 'vite' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'to capture' means one lot of letters goes inside another.
'good' becomes 'g' (abbreviation).
'clear' becomes 'net' (as in net profit).
'g'+'net'='gnet'
'vite' placed around 'gnet' is 'VIGNETTE'.
(Other definitions for vignette that I've seen before include "Character sketch - word picture" , "Word-picture" , "Brief literary description" , "by way of illustration" , "Short description or character sketch" .)