Someone to lean on after you drink the beer? (9)

I believe the answer is:

supporter

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'someone' is the definition.
(I know that supporter is a type of advocate)

'drink the beer?' is the wordplay.
'drink' becomes 'sup' (to sup is to drink).
'the beer?' becomes 'porter' (type of beer).
'sup'+'porter'='SUPPORTER'

'to lean on after you' is the link.
This may not be right. Some or all of it may be part of another bit of the clue.

Can you help me to learn more?

(Other definitions for supporter that I've seen before include "Advocate" , "sports fan?" , "Strut" , "angel" , "Champion" .)

I've seen this clue in the Evening Standard.

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