Went round gallery guarded by staff (7)
I believe the answer is:
rotated
'went round' is the definition.
(to rotate is to go round and round)
'gallery guarded by staff' is the wordplay.
'gallery' becomes 'tate' (Tate Modern, Tate Britain etc).
'guarded by' is an insertion indicator.
'staff' becomes 'rod' (both can mean a stick or cane).
'tate' inserted within 'rod' is 'ROTATED'.
(Other definitions for rotated that I've seen before include "took part in revolution" , "Spun" , "Revolved" , "Had spin" , "Turned in a circle around an axis" .)