Mini cheese sandwiches for a particular market (5)

I believe the answer is:

niche

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'particular market' is the definition.
'niche' can be an answer for 'market' (I've seen this before). I'm not sure about the 'particular' bit.

'mini cheese sandwiches' is the wordplay.
'sandwiches' indicates a hidden word (the answer is sandwiched in by the clue).
'NICHE' can be found hidden inside 'mini cheese'.

'for a' is the link.

Can you help me to learn more?

(Other definitions for niche that I've seen before include "hole" , "Nook or recess" , "Suitable location" , "Suitable spot" , "Recess; comfy corner" .)

I've seen this clue in The Times.

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