Ignoring golf, Roger's chat disturbed group of players (9)
I believe the answer is:
orchestra
'group of players' is the definition.
(I've seen this before)
'ignoring golf roger's chat disturbed' is the wordplay.
'ignoring' is a deletion indicator.
'golf' becomes 'g' (phonetic alphabet: alpha, bravo, charlie etc.).
'disturbed' indicates an anagram.
'rogers'+'chat'='rogerschat'
'rogerschat' with 'g' taken away is 'roerschat'.
'roerschat' anagrammed gives 'ORCHESTRA'.
(Other definitions for orchestra that I've seen before include "Musical ensemble" , "Assembly of musicians as in pit" , "Group of musical instrumentalists" , "Gamelan, for instance" , "Instrumental group" .)