Show travelled round (5)
I believe the answer is:
rodeo
'show' is the definition.
(I know that rodeo is a type of exhibition)
'travelled round' is the wordplay.
'travelled' becomes 'rode' (eg travelled on a horse).
'round' becomes 'o' (round can mean a round object).
'rode'+'o'='RODEO'
(Other definitions for rodeo that I've seen before include "Western show" , "display of cowboy skill" , "Wild West contest" , "skilful exhibition?" , "stock venue?" .)