Settlement is rejected in warehouse (7)
I believe the answer is:
deposit
'settlement' is the definition.
(thesaurus)
'is rejected in warehouse' is the wordplay.
'rejected' says the letters should be written backwards.
'in' means one lot of letters goes inside another.
'warehouse' becomes 'depot' (I've seen this in another clue).
'is' written backwards gives 'si'.
'si' going into 'depot' is 'DEPOSIT'.
(Other definitions for deposit that I've seen before include "Sediment or bank lodgment" , "Down-payment" , "part-payment" , "secure an item" , "Precipitate" .)