Picked up drink to go in tent (6)
I believe the answer is:
teepee
'tent' is the definition.
(teepee is a kind of tent)
'picked up drink to go' is the wordplay.
'picked up' shows a homophone (sound like).
'drink' becomes 'tea' (tea is a kind of drink).
'to go' becomes 'pee' (both can mean to urinate).
'tea' is a homophone of 'tee'.
'tee'+'pee'='TEEPEE'
'in' is the link.
(Other definitions for teepee that I've seen before include "N. American native tent" , "Cone-shaped tent of animal skins" , "Wigwam" , "Conical tent of American Indians" , "Conical American Indian tent" .)