Crime turned out not quite so uncharitable (9)

I believe the answer is:

merciless

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

'quite so uncharitable' is the definition.
'merciless' can be an answer for 'uncharitable' (I've seen this before). I am unsure of the 'quite so' bit.

'crime turned out not' is the wordplay.
'turned out' indicates an anagram (turn out can mean to organise).
'not' becomes 'less' (I've seen this in other clues).
'crime' is an anagram of 'merci'.
'merci'+'less'='MERCILESS'

Can you help me to learn more?

(Other definitions for merciless that I've seen before include "Showing no compassion" , "Totally unforgiving" , "Ruthless" , "Uncharitable" , "Cruel" .)

I've seen this clue in The Mirror.

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