Regal tour arranged for governor? (9)
I believe the answer is:
regulator
'for governor?' is the definition.
(governor is a kind of regulator)
'regal tour arranged' is the wordplay.
'arranged' indicates an anagram.
'regal'+'tour'='regaltour'
'regaltour' with letters rearranged gives 'REGULATOR'.
(Other definitions for regulator that I've seen before include "Controller" , "Ofsted perhaps" , "Controlling device" , "Governor" , "Supervisor" .)