An empty potty gets deposit perhaps (7)
I believe the answer is:
payment
'deposit perhaps' is the definition.
(I know that down payment is a payment)
'an empty potty' is the wordplay.
'potty' indicates anagramming the letters.
'an'+'empty'='anempty'
'anempty' is an anagram of 'PAYMENT'.
'gets' is the link.
(Other definitions for payment that I've seen before include "Remuneration - outlay" , "Punishment" , "Recompense, reward" , "Purchase price" , "Discharge of an obligation with money" .)