A cricket club about to expel individual based on hearing (8)
I believe the answer is:
acoustic
'based on hearing' is the definition.
(acoustic means relating to sound)
'a cricket club about to expel individual' is the wordplay.
'cricket club' becomes 'cc' (cricketing abbreviation).
'about' means one lot of letters goes inside another.
'to expel' becomes 'oust' ('oust' can be a synonym of 'expel').
'individual' becomes 'i' (Roman numeral for one).
'oust'+'i'='ousti'
'cc' going around 'ousti' is 'coustic'.
'a'+'coustic'='ACOUSTIC'
(Other definitions for acoustic that I've seen before include "Of the physical properties of sound" , "Pertaining to hearing" , "This guitar is not electric" , "Relating to hearing" , "Of sound or the sense of hearing" .)