Fellow player cooked meat more than once (8)
I believe the answer is:
teammate
'fellow player' is the definition.
(I've seen this before)
'cooked meat more than once' is the wordplay.
'cooked' is an anagram indicator (letters cooked into a new form).
'more than once' becomes 'mate' (I can't justify this - if you can you should believe this answer much more).
'meat' is an anagram of 'team'.
'team'+'mate'='TEAMMATE'
Can you help me to learn more?
(Another definition for teammate that I've seen is " fellow player".)