Odds on tour being disrupted to grow (6)
I believe the answer is:
sprout
'grow' is the definition.
(sprouting is a kind of growing)
'odds on tour being disrupted' is the wordplay.
'odds' becomes 'sp' (betting abbreviation for starting price**).
'on' indicates putting letters inside.
'being disrupted' indicates an anagram.
'tour' with letters rearranged gives 'rout'.
'sp' placed into 'rout' is 'SPROUT'.
'to' acts as a link.
(Other definitions for sprout that I've seen before include "Produce buds" , "Suddenly grow" , "Grow during stupor" , "Grow; vegetable" , "Bud; a type of cabbage" .)