Let rip! (4)
I believe the answer is:
rent
I believe this is a double definition.
'let' is the first definition.
(synonyms)
'rip' is the second definition.
(synonyms)
(Other definitions for rent that I've seen before include "Lease - torn apart" , "Let out - torn" , "ruined" , "Payment - in pieces" , "Torn, due to landlord" .)