We are people against old models taking the pee! (8)

I believe the answer is:

opposers

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'we are people against' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.

'old models taking the pee' is the wordplay.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'models' becomes 'posers' ('poser' can be a synonym of 'model').
'taking' means one lot of letters goes inside another.
'the pee' becomes 'p'.
'posers' enclosing 'p' is 'pposers'.
'o'+'pposers'='OPPOSERS'

Can you help me to learn more?

(Other definitions for opposers that I've seen before include "dissenters" , "adversaries" .)

I've seen this clue in The Independent.

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