Attached new structure briefly to support component of wheel (6,3)
I believe the answer is:
spoken for
'component of wheel' is the definition.
The answer and definition are not the same part of speech. However, past participle verbs and adjectives sometimes mean the same thing.
'attached new structure briefly to support' is the wordplay.
'attached' is a charade indicator (letters next to each other).
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'structure briefly' becomes 'spoke' (spoke is a kind of structure. I am not sure about the 'briefly' bit.).
'to' becomes 'for'.
'support' means one lot of letters go next to another (in a down clue, some letters hold others up).
'n' put after 'spoke' is 'spoken'.
'spoken'+'for'='SPOKEN FOR'
Can you help me to learn more?
(Other definitions for spoken for that I've seen before include "Having romantic commitment" , "Engaged" , "Already claimed" , "Romantically attached" , "Sold!" .)