Rowdy old Tories scrambled aboard coach (10)
I believe the answer is:
boisterous
'rowdy' is the definition.
(I've seen this in another clue)
'old tories scrambled aboard coach' is the wordplay.
'old' becomes 'o' (abbreviation).
'scrambled' indicates an anagram.
'aboard' means one lot of letters goes inside another.
'coach' becomes 'bus' (synonyms).
'o'+'tories'='otories'
'otories' with letters rearranged gives 'oistero'.
'oistero' placed into 'bus' is 'BOISTEROUS'.
(Other definitions for boisterous that I've seen before include "Noisy and lively" , "rollicking" , "Exuberant" .)