Muscat's country (4)
I believe the answer is:
oman
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">muscat's country</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for oman that I've seen before include "Middle Eastern country" , "Gulf state" , "Former Gulf country, Muscat and --" , "Arabian peninsula country" , "Land" .)