Leading tramp into wild (9)
I believe the answer is:
important
'leading' is the definition.
(I've seen this before)
'tramp into wild' is the wordplay.
'wild' is an anagram indicator.
'tramp'+'into'='trampinto'
'trampinto' is an anagram of 'IMPORTANT'.
(Other definitions for important that I've seen before include "influential" , "A priority" , "Noted" , "Eminent" , "Crucial" .)