Wild in the morning, fine after that (4)
I believe the answer is:
amok
'wild' is the definition.
(I've seen this in another clue)
'morning fine after that' is the wordplay.
I cannot really understand how this works, but
'morning' could be 'am' and 'am' is located in the answer.
'fine' could be 'ok' (synonyms) and 'ok' is found within the answer.
This accounts for all the letters.
This explanation may well be incorrect...
'in the' is the link.
Can you help me to learn more?
(Other definitions for amok that I've seen before include "Frenziedly" , "Going mad" , "(Run) in frenzied state" , "Run thus to be wild and uncontrolled" , "(Run) wild, out of control" .)