Crossword Genius

There's not much flesh on this small, trim guy (5,3)

Ross

I believe the answer is:

spare rib

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'there's not much flesh' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'this small trim guy' is the wordplay.
'this small' becomes 's' (abbreviation - e.g. clothes size).
'trim' becomes 'pare' (synonyms).
'guy' becomes 'rib' (both can mean to tease).
's'+'pare'+'rib'='SPARE-RIB'

'on' is the link.

Can you help me to learn more?

(Other definitions for spare rib that I've seen before include "Only a little pork on this bone" , "God gave Adam" , "piece of pork" , "cut of meat" , "Bone in barbecue sauce, say" .)

I've seen this clue in The Telegraph.
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