Glass for the acrobat (7)
I believe the answer is:
tumbler
I believe this is a double definition.
'glass' is the first definition.
(I know that tumbler is a type of glass)
'acrobat' is the second definition.
(synonyms)
'for the' acts as a link.
(Other definitions for tumbler that I've seen before include "Constantly dropping" , "A glass; a pigeon" , "slipper may become this" , "used to drink" , "He performs feats" .)