Mostly free to tour Australia, stopped dead (5)
I believe the answer is:
froze
'stopped dead' is the definition.
('freeze' can be a synonym of 'stop dead')
'mostly free to tour australia' is the wordplay.
'mostly' means to remove the last letter.
'to tour' is an insertion indicator (to tour can mean to go around).
'australia' becomes 'oz'.
'free' with its final letter taken away is 'fre'.
'fre' placed around 'oz' is 'FROZE'.
(Other definitions for froze that I've seen before include "suddenly stopped" , "Stopped dead" , "Became motionless" , "Became immobilised" , "Suddenly stood motionless" .)