Abhor husband being enthralled by gloater endlessly (6)
I believe the answer is:
loathe
'abhor' is the definition.
('loathe' can be a synonym of 'abhor')
'husband being enthralled by gloater endlessly' is the wordplay.
'husband' becomes 'h'.
'being enthralled by' means one lot of letters goes inside another ('enthral' can mean 'capture').
'endlessly' indicates the central letters (the ends of the words are removed).
The central letters of 'gloater' are 'loate'.
'h' placed inside 'loate' is 'LOATHE'.
(Other definitions for loathe that I've seen before include "To heal (anag)" , "Can't stand" , "Dislike intensely" , "Greatly hate" , "Abhor, execrate" .)