Reserve side cut short refresher? (3,3)
I believe the answer is:
ice tea
'refresher?' is the definition.
(I've seen this before)
'reserve side cut' is the wordplay.
'reserve' becomes 'ice ' (both can mean aloofness).
'side' becomes 'team' (a side is a sporting team).
'cut' means to remove the last letter.
'team' with its last letter removed is 'tea'.
'ice'+'tea'='ICE TEA'
'short' acts as a link.
(Other definitions for ice tea that I've seen before include "Chilled drink flavoured with lemon" , "Cool non-alcoholic drink" , "Cold summer drink" , "refreshing drink" , "refresher" .)