Players ultimately plump for Australian beer (6)
I believe the answer is:
stubby
'australian beer' is the definition.
(Australian beer bottle size)
'players ultimately plump' is the wordplay.
'ultimately' suggests the final letters.
'plump' becomes 'tubby' (I've seen this before).
The last letter of 'players' is 's'.
's'+'tubby'='STUBBY'
'for' acts as a link.
(Other definitions for stubby that I've seen before include "Short, thick and strong" , "Thickset" , "Short and blunt" , "Squat" .)