Thanks - boyfriend's wrapping large picture (7)
I believe the answer is:
tableau
'picture' is the definition.
(a tableau is a picture or display)
'thanks boyfriend's wrapping large' is the wordplay.
'thanks' becomes 'ta' (UK informal version of 'thank you').
'boyfriend' becomes 'beau' (synonyms).
'wrapping' indicates putting letters inside.
'large' becomes 'L' (eg in clothes sizes).
'beau' enclosing 'l' is 'bleau'.
'ta'+'bleau'='TABLEAU'
(Other definitions for tableau that I've seen before include "'Frozen' theatrical scene" , "Scene of still figures" , "Pageant" , "pictorial presentation" , "still life?" .)