Popular Mexican beer (6)
I believe the answer is:
corona
'popular mexican beer' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for corona that I've seen before include "Circle of light; cigar" , "Racoon (anag.)" , "Long cigar" , "Sun's envelope; cigar" , "Circle of light around sun or moon" .)