Football club in sore distress! (6)
I believe the answer is:
soccer
'football' is the definition.
(soccer is a kind of football)
'club in sore distress' is the wordplay.
'club' becomes 'cc' (I can't justify this - if you can you should give a lot more credence to this answer).
'in' means one lot of letters goes inside another.
'distress' indicates anagramming the letters.
'sore' is an anagram of 'soer'.
'cc' going inside 'soer' is 'SOCCER'.
Can you help me to learn more?
(Other definitions for soccer that I've seen before include "Roy Keane's game" , "Informally, game" , "Association football" , "... players playing this (colloquially)" , "Football for Americans?" .)