Very old squad I assembled for picture (3,5)
I believe the answer is:
quo vadis
'picture' is the definition.
(1951 film)
'very old squad i assembled' is the wordplay.
'very' becomes 'v' (abbreviation).
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'assembled' indicates anagramming the letters.
'v'+'o'+'squad'+'i'='vosquadi'
'vosquadi' anagrammed gives 'QUO VADIS'.
'for' acts as a link.
(Other definitions for quo vadis that I've seen before include "MGM 1951 Roman epic" , "Where are you going? (Latin)" .)