You really want the thing, child? (4)

I believe the answer is:

itch

I'm a little stuck... Click here to teach me more about this clue!

'you really want' is the definition.
I can't tell whether this defines the answer.

'thing child?' is the wordplay.
'thing' becomes 'it'.
'child?' becomes 'ch' (abbreviation for child).
'it'+'ch'='ITCH'

'the' acts as a link.

Can you help me to learn more?

(Other definitions for itch that I've seen before include "Irritating pain" , "Yen" , "Constant desire" , "Longing; anag. of 19" , "great desire" .)

I've seen this clue in the Evening Standard.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.