Tour is arranged for admirer (6)
I believe the answer is:
suitor
'for admirer' is the definition.
(suitor is a kind of admirer)
'tour is arranged' is the wordplay.
'arranged' indicates anagramming the letters (letters rearranged).
'tour'+'is'='touris'
'touris' anagrammed gives 'SUITOR'.
(Other definitions for suitor that I've seen before include "Prospective husband" , "One seeking marriage" , "Man who is courting a woman" , "He pays court to a woman" , "He woos a maid" .)