Maybe snaps house up, having pocketed a thousand pounds (6)
I believe the answer is:
images
'house up having pocketed a thousand pounds' is the definition.
I can't tell whether this definition defines the answer.
'maybe snaps' is the wordplay.
'maybe' becomes 'i' (I've seen this in other clues).
'snaps' becomes 'mages' (I can't explain this - if you can you should give a lot more credence to this answer).
'i'+'mages'='IMAGES'
Can you help me to learn more?
(Other definitions for images that I've seen before include "Likenesses or effigies" , "Reflections in mirrors" , "Pictures, representations" , "Photos or representations" , "Likenesses, representations" .)