Crossword Genius

Slim, not up to it, depended upon others (5,2)

Ross

I believe the answer is:

leant on

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'depended upon others' is the definition.
I can't judge whether this defines the answer.

'slim not up to it' is the wordplay.
'slim' becomes 'lean' (similar in meaning).
'up' is a reversal indicator (in down clue: letters go upwards).
'to it' is a charade indicator (letters next to each other).
'not' reversed gives 'ton'.
'lean'+'ton'='LEANT ON'

Can you help me to learn more?

(Other definitions for leant on that I've seen before include "Depended upon" , "Pressed" .)

I've seen this clue in the Evening Standard.
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