Muslim market? It's substantially like this country (4)
I believe the answer is:
souk
'muslim market?' is the definition.
'souk' can be an answer for 'market?' (souk is a kind of market). I'm not certain of the 'muslim' bit.
'substantially like this country' is the wordplay.
I cannot really understand how this works, but
'country' could be 'uk' (United Kingdom) and 'uk' is found within the answer.
'like this' could be 'so' ('like so') and 'so' is found within the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'it's' is the link.
Can you help me to learn more?
(Other definitions for souk that I've seen before include "Arab open-air market" , "Eastern market" , "Arab marketplace" , "Marketplace in Muslim countries" , "Arab bazaar" .)