Humiliate husband in uniform (5)
I believe the answer is:
shame
'humiliate' is the definition.
(I've seen this in another clue)
'husband in uniform' is the wordplay.
'husband' becomes 'h'.
'in' is an insertion indicator.
'uniform' becomes 'same' (synonyms).
'h' going inside 'same' is 'SHAME'.
(Other definitions for shame that I've seen before include "Painful emotion resulting from guilt" , "show up" , "Disgrace, ignominy" , "disgraceful" , "Disgrace - Salman Rushdie novel" .)