Is it a sensation you want? (4)

I believe the answer is:

itch

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'want?' is the definition.
(thesaurus)

'is it a sensation' is the wordplay.
'a sensation' becomes 'ch' (I can't explain this - if you can you should give a lot more credence to this answer).
'it'+'ch'='ITCH'

'you' is the link.

Can you help me to learn more?

(Other definitions for itch that I've seen before include "Prickle" , "that's irritating" , "Teasing desire" , "It needs to be scratched" , "Tickling sensation of skin" .)

I've seen this clue in the Evening Standard.

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