Loser having grand time? It creates resentment (7)
I believe the answer is:
dudgeon
'resentment' is the definition.
(I've seen this before)
'loser having grand time? it' is the wordplay.
I cannot really understand how this works, but
'loser' could be 'dud' (dud is a kind of loser) and 'dud' is located in the answer.
'grand' could be 'g' (G is short for grand as in a thousand) and 'g' is found in the answer.
'time?' could be 'eon' (eon is a kind of time) and 'eon' is located in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'creates' is the link.
Can you help me to learn more?
(Other definitions for dudgeon that I've seen before include "Sullenness" , "feeling of resentment" , "Umbrage" , "Anger" , "Deep resentment" .)