Tent patched up after deductions (4)
I believe the answer is:
nett
'after deductions' is the definition.
(I've seen this before)
'tent patched up' is the wordplay.
'patched up' indicates an anagram (the letters are repaired or patched up).
'tent' is an anagram of 'NETT'.
(Other definitions for nett that I've seen before include "After making deductions" , "Final" , "Clear of tax" , "cleared of all charges" , "After taxes" .)