Pay a call on the man: a foppish type (8)

I believe the answer is:

popinjay

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'a foppish type' is the definition.
(I've seen this before)

'pay a call on the man' is the wordplay.
'pay a call on' becomes 'popin' (I can't explain this - if you can you should believe this answer much more).
'the man' becomes 'Jay'.
'popin'+'jay'='POPINJAY'

Can you help me to learn more?

(Other definitions for popinjay that I've seen before include "One super-smart" , "Coxcomb" , "vain sort" , "Strutting fop" , "Conceited person" .)

I've seen this clue in the Evening Standard.

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