English fanatical about cheesy town (4)
I believe the answer is:
edam
'cheesy town' is the definition.
(I've seen this in another clue)
'english fanatical about' is the wordplay.
'english' becomes 'E' (abbreviation).
'fanatical' becomes 'mad' (I've seen this in another clue).
'about' says the letters should be written backwards.
'mad' in reverse letter order is 'dam'.
'e'+'dam'='EDAM'
(Other definitions for edam that I've seen before include "Made (anag) - Dutch cheese" , "Made into popular cheese" , "Red-coated cheese" , "Danish cheese" , "Sphere of Dutch cheese" .)