Came out and scowled at the fellow (8)
I believe the answer is:
flowered
'came out' is the definition.
The definition and answer can be both related to change as well as being past participle verbs.
Perhaps there's an association between them I don't understand?
'scowled at the fellow' is the wordplay.
I cannot quite understand how this works, but
'fellow' could be 'ed' (I've seen this in other clues) and 'ed' is located in the answer.
The remaining letters 'flower' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'and' is the link.
Can you help me to learn more?
(Other definitions for flowered that I've seen before include "opened out" , "Reached a peak" , "Blossomed" , "Bloomed" , "Put forth blossom" .)