Let cash fall out of bag (7)
I believe the answer is:
satchel
'bag' is the definition.
(satchel is a type of bag)
'let cash fall' is the wordplay.
'fall' indicates anagramming the letters (I've seen 'fallen' mean this).
'let'+'cash'='letcash'
'letcash' with letters rearranged gives 'SATCHEL'.
'out of' is the link.
(Other definitions for satchel that I've seen before include "Bag with a strap for books" , "Carrier for school books" , "Schoolbag for children's books" , "Bag -- latches (anag)" , "Get school item" .)