Reportedly worry - horse is getting cheese (10)
I believe the answer is:
caerphilly
'cheese' is the definition.
(thesaurus)
'reportedly worry horse is' is the wordplay.
I cannot quite see how this works, but
'worry' could be 'ill' and 'ill' is located in the answer.
'horse' could be 'h' (abbreviation as in horse power) and 'h' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
'getting' acts as a link.
Can you help me to learn more?
(Other definitions for caerphilly that I've seen before include "Welsh town" , "Town north of Cardiff" , "Mild white cheese" .)