Odd bits of old material specially fashioned for customer (6-4)
I believe the answer is:
tailor-made
'fashioned for customer' is the definition.
(made for a particular customer)
'odd bits of old material specially' is the wordplay.
'odd bits of' means one should take alternating letters.
'specially' is an anagram indicator (I've seen this in other clues).
The alternating letters of 'old' are 'od'.
'od'+'material'='odmaterial'
'odmaterial' anagrammed gives 'TAILOR-MADE'.
(Other definitions for tailor-made that I've seen before include "Created for a particular purpose" , "Designed specially" .)