Great Movie, White House in Spain (10)
I believe the answer is:
casablanca
'great movie' is the definition.
'casablanca' can be an answer for 'movie' (I have seen 'romantic movie' mean 'casablanca' so perhaps 'movie' could also mean 'casablanca'). I am not certain of the 'great' bit.
'white house in spain' is the wordplay.
I cannot quite see how this works, but
'white' could be 'blanc' (I've seen this before) and 'blanc' is found within the answer.
'house' could be 'casa' (Spanish word for 'house' also used in English) and 'casa' is found in the answer.
A single letter 'a' remains which might be clued in a way I don't see.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for casablanca that I've seen before include "White House for Cubans" , "Major city of Morocco" , "Moroccan port - 1942 Bogart/Bergman film" , "1942 film starring Bogart and Bergman" , "romantic movie" .)