Immature, getting in middle of clubland fight (5)
I believe the answer is:
brawl
'fight' is the definition.
(I know that fight can be written as brawl)
'immature getting in middle of clubland' is the wordplay.
'immature' becomes 'raw' (I've seen this in another clue).
'getting in' is an insertion indicator.
'middle of' indicates the central letters.
The central letters of 'clubland' are 'bl'.
'raw' put into 'bl' is 'BRAWL'.
(Other definitions for brawl that I've seen before include "Riotous fight" , "Noisy crowd fight" , "Unruly fight" , "Scuffle, unseemly fight" , "Affray" .)