A red van's going around galleries (8)
I believe the answer is:
verandas
'galleries' is the definition.
('veranda' can be a synonym of 'gallery')
'a red van's going around' is the wordplay.
'going around' is an anagram indicator.
'a'+'red'+'vans'='aredvans'
'aredvans' is an anagram of 'VERANDAS'.
(Other definitions for verandas that I've seen before include "Porches alongside buildings" , "Porches outside buildings" , "Large open porches" .)