Crossword Genius

Tees upset about hypocrisy concerning trade (10)

Ross

I believe the answer is:

mercantile

I'm a little stuck... Click here to teach me more about this clue!

'concerning trade' is the definition.
(I've seen this before)

'tees upset about hypocrisy' is the wordplay.
I cannot quite see how this works, but
'tees' could be 'me' (where the crossword setter is 'Tees') and 'me' is located in the answer.
'about' could be 'ca' (short for circa) and 'ca' is found in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for mercantile that I've seen before include "Relating to (overseas) trade" , "Dealing with trade" , "Commercial" , "Relating to trade or commerce" , "related to business" .)

I've seen this clue in The Independent.
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