Tramp into wild to find material (9)
I believe the answer is:
important
'material' is the definition.
(I've seen this before)
'tramp into wild' is the wordplay.
'wild' indicates an anagram.
'tramp'+'into'='trampinto'
'trampinto' with letters rearranged gives 'IMPORTANT'.
'to find' is the link.
(Other definitions for important that I've seen before include "Historic" , "A priority" , "Noteworthy, significant" , "of great concern" , "influential" .)