Have drink with big city chap somewhere in Spain (2,6)
I believe the answer is:
la mancha
'somewhere in spain' is the definition.
The definition suggests a singular noun which matches the answer.
'have drink with big city chap' is the wordplay.
I cannot quite understand how this works, but
'drink' could be 'cha' (cha can mean tea) and 'cha' is found in the answer.
'city' could be 'la' (Los Angeles) and 'la' is found in the answer.
'chap' could be 'man' (chap can mean a man) and 'man' is found within the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for la mancha that I've seen before include "Don Quixote's home" , "Spanish region associated with Don Quixote" , "Don Quixote's region of Spain" , "Don's home" , "Musical about Don Quixote 'Man of . . . . . . . ." .)