Minister’s previous tour oddly cancelled (6)
I believe the answer is:
pastor
'minister's' is the definition.
(synonyms)
'previous tour oddly cancelled' is the wordplay.
'previous' becomes 'past' (similar in meaning).
'oddly cancelled' means one should take alternating letters (letters in odd-numbered positions removed).
The alternate letters of 'tour' are 'or'.
'past'+'or'='PASTOR'
(Other definitions for pastor that I've seen before include "Churchman" , "Padre perhaps" , "Member of the clergy" , "Minister; shepherd" , "Old shepherd" .)