Vessel taken by gymnast (7)
I believe the answer is:
tumbler
I believe this is a double definition.
'vessel' is the first definition.
(I've seen this before)
'gymnast' is the second definition.
(I know that tumbler is a type of gymnast)
'taken by' acts as a link.
(Other definitions for tumbler that I've seen before include "Drinking glass or old acrobat" , "slipper may become this" , "Type of drinking glass" , "A large glass" , "One flips" .)