Crossword Genius

Tailored suits come with alteration initially discussed (10)

Ross

I believe the answer is:

customised

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'initially discussed' is the definition.
Although both the answer and definition are past participle verbs, I can't understand how one could define the other.

'tailored suits come with alteration' is the wordplay.
'tailored' indicates anagramming the letters (the letters are customised ).
'with' says to put letters next to each other.
'alteration' becomes 'd' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'suits'+'come'='suitscome'
'suitscome' is an anagram of 'customise'.
'customise'+'d'='CUSTOMISED'

Can you help me to learn more?

(Another definition for customised that I've seen is " Specially-made".)

I've seen this clue in The Times.
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