Track emerging trade opportunity (9)

I believe the answer is:

newmarket

'track' is the definition.
(Newmarket Racecourse)

'emerging trade opportunity' is the wordplay.
'emerging' becomes 'new' (emerging can mean new or up and coming).
'trade opportunity' becomes 'market' (place to trade).
'new'+'market'='NEWMARKET'

(Other definitions for newmarket that I've seen before include "course?" , "Betting card came" , "Racecourse - card game" , "Racing town" , "Suffolk racecourse" .)

I've seen this clue in The Times.

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