Found in house, a selfish artist's frame (5)
I believe the answer is:
easel
'artist's frame' is the definition.
(I've seen this before)
'found in house a selfish' is the wordplay.
'found in' indicates a hidden word.
'EASEL' is hidden within 'house a selfish'.
(Other definitions for easel that I've seen before include "the rest of the paintwork" , "artistic aid" , "Painter's frame" , "Artist's prop" , "Standing supporter" .)