Deceitful probably, inglorious hosts (5)
I believe the answer is:
lying
'deceitful' is the definition.
(I've seen this in another clue)
'probably inglorious hosts' is the wordplay.
'hosts' indicates the answer is hidden within the clue.
'LYING' is hidden within 'probably inglorious'.
(Other definitions for lying that I've seen before include "Deviating from truth" , "Flat" , "Mendacious; recumbent" , "Dishonest" , "retailing pork pies" .)