Hire in Brentwood (4)
I believe the answer is:
rent
'hire' is the definition.
(synonyms)
'in brentwood' is the wordplay.
'in' says the answer is hidden in the clue.
'RENT' can be found hidden inside 'brentwood'.
(Other definitions for rent that I've seen before include "Payment for lodging etc" , "One due a letter" , "Torn, due to landlord" , "Let out - torn" , "Payment for accommodation - that's torn it" .)