Woodcraft backing rubber tyres (8)
I believe the answer is:
forestry
'woodcraft' is the definition.
(thesaurus)
'backing rubber tyres' is the wordplay.
I cannot really see how this works, but
'backing' could be 'for' (I've seen this in another clue) and 'for' is found within the answer.
an anagram of 'tyres' is 'estry' which is present in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for forestry that I've seen before include "The commercial business of growing and cultivating trees" , "The planting and management of timber" , "Science of trees" , "expanse of trees" , "Growing wood" .)