Judge's conclusion following adjustment of legal claim (6)
I believe the answer is:
allege
'claim' is the definition.
(thesaurus)
'judge's conclusion following adjustment of legal' is the wordplay.
'conclusion' suggests the final letters.
'following' is a charade indicator (letters next to each other).
'adjustment of' indicates anagramming the letters (I've seen this in other clues).
The last letter of 'judge' is 'e'.
'legal' anagrammed gives 'alleg'.
'e' put after 'alleg' is 'ALLEGE'.
(Other definitions for allege that I've seen before include "Aver - maintain" , "Make accusation without proof" , "Declare or assert without proof" , "Claim (a person is guilty)" , "Accuse without established proof" .)