Film of artist popular with staff (4,3)
I believe the answer is:
rain man
'film' is the definition.
(1988 film)
'artist popular with staff' is the wordplay.
'artist' becomes 'RA' (Royal Academician, member of Royal Academy of Arts).
'popular' becomes 'in' ('in' can mean trendy).
'with' is a charade indicator (letters next to each other).
'staff' becomes 'man' (as in staffing or manning a particular place).
'ra'+'in'+'man'='RAIN MAN'
'of' is the link.
(Other definitions for rain man that I've seen before include "7 film" , "movie" , "drama film" , "Film with Dustin Hoffman and Tom Cruise" .)