Merchant and master intermingled (9)

I believe the answer is:

tradesman

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

'merchant' is the definition.
(I know that tradesman is a type of merchant)

'and master intermingled' is the wordplay.
'and master' can be anagrammed to 'TRADESMAN'.
But, I am not sure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for tradesman that I've seen before include "I must sell stuff" , "Buyer/seller of goods" , "Small businessman" , "Retailer - artisan" , "Small-scale businessman" .)

I've seen this clue in The Irish Independent.

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