Send Delaware’s material for repair (8)
I believe the answer is:
despatch
'send' is the definition.
(despatching is a kind of sending)
'delaware's material for repair' is the wordplay.
I cannot really understand how this works, but
'delaware's' could be 'des' (standard two letter abbrev) and 'des' is located in the answer.
'material' could be 'patch' (patch is a kind of material) and 'patch' is located in the answer.
This accounts for all the letters.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for despatch that I've seen before include "Send off, ship" , "Send off, kill" , "Send out of cash dept" , "Send away" , "Send out - chest pad (anag)" .)