Fish with reason to change, changes (10)

I believe the answer is:

refashions

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'changes' is the definition.
Although both the answer and definition are verbs in their -s form, I can't understand how one could define the other.

'fish with reason to change' is the wordplay.
'with' is a charade indicator (letters next to each other).
'to change' indicates anagramming the letters.
'fish'+'reason'='fishreason'
'fishreason' is an anagram of 'REFASHIONS'.

Can you help me to learn more?

I've seen this clue in The Independent.

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