Put back legal document containing deposit (7)
I believe the answer is:
delayed
'put back' is the definition.
(I've seen this before)
'legal document containing deposit' is the wordplay.
'legal document' becomes 'deed' (deed is a kind of legal document).
'containing' is an insertion indicator.
'deposit' becomes 'lay' (I've seen this in another clue).
'deed' going around 'lay' is 'DELAYED'.
(Other definitions for delayed that I've seen before include "Deferred, postponed" , "Made late" , "Held up, back" , "Hindered" , "Caused to be held up" .)