Films so absorbing a Cubist pioneer (7)
I believe the answer is:
picasso
'cubist pioneer' is the definition.
'picasso' can be an answer for 'pioneer' (I have seen 'pioneer of Cubism' mean 'picasso' so perhaps 'pioneer' could also mean 'picasso'). I am unsure of the 'cubist' bit.
'films so absorbing a' is the wordplay.
'films' becomes 'pics'.
'absorbing' indicates putting letters inside.
'pics'+'so'='picsso'
'picsso' going around 'a' is 'PICASSO'.
Can you help me to learn more?
(Other definitions for picasso that I've seen before include "20th century painter" , "Spanish painter, d. 1973" , "Pablo, great Spanish painter" , "Pablo -, artist (Guernica)" , "As cop is a Spanish painter" .)