Deficient partnership finally allowed to block wages (10)
I believe the answer is:
incomplete
'deficient' is the definition.
(thesaurus)
'partnership finally allowed to block wages' is the wordplay.
'finally' says to take the final letters.
'allowed to' becomes 'let' (to let something happen is to allow it).
'block' is an insertion indicator (upper walls off glass inside formal).
'wages' becomes 'income' (I've seen this in another clue).
The final letter of 'partnership' is 'p'.
'p'+'let'='plet'
'plet' inserted within 'income' is 'INCOMPLETE'.
(Other definitions for incomplete that I've seen before include "not sufficient" , "not done" , "Unfinished" , "Not yet finished" , "Inadequate" .)