Get garage to make new arrangement for collection of parts (9)
I believe the answer is:
aggregate
'new arrangement for collection of parts' is the definition.
I can't judge whether this definition defines the answer.
'get garage to make' is the wordplay.
'to make' is an anagram indicator.
'get'+'garage'='getgarage'
'getgarage' is an anagram of 'AGGREGATE'.
Can you help me to learn more?
(Other definitions for aggregate that I've seen before include "The whole amount" , "Sum total" , "Material to make concrete, mortar, or plaster" , "Collective total - a great egg (anag)" , "Get garage to do sum" .)