Cheese clubs are excited by Philadelphia (10)
I believe the answer is:
caerphilly
'cheese' is the definition.
(thesaurus)
'clubs are excited by philadelphia' is the wordplay.
'clubs' becomes 'c' (abbreviation used in card games such as bridge).
'excited' indicates an anagram.
'by philadelphia' becomes 'philly' (I can't justify this - if you can you should believe this answer much more).
'are' anagrammed gives 'aer'.
'c'+'aer'+'philly'='CAERPHILLY'
Can you help me to learn more?
(Other definitions for caerphilly that I've seen before include "Town north of Cardiff" , "Mild white cheese" , "Welsh town" .)