Like American uncle to get some tea (5)
I believe the answer is:
assam
'some tea' is the definition.
(I've seen this before)
'like american uncle' is the wordplay.
'like' becomes 'as'.
'american uncle' becomes 'Sam' (Uncle Sam is a nickname for the USA).
'as'+'sam'='ASSAM'
'to get' acts as a link.
(Other definitions for assam that I've seen before include "Tea-growing region" , "region out east" , "Variety of tea" , "North-east Indian tea state" , "Tea-producing Indian state" .)