Material from New York, London university lecturer dismissed (5)
I believe the answer is:
nylon
'material' is the definition.
(I know that nylon is a type of material)
'new york london university lecturer dismissed' is the wordplay.
'new york' becomes 'ny'.
'university lecturer' becomes 'don' (don can mean an academic - especially at Oxbridge).
'dismissed' suggests deleting specific letters.
'london' with 'don' removed is 'lon'.
'ny'+'lon'='NYLON'
'from' acts as a link.
(Other definitions for nylon that I've seen before include "Synthetic polymer" , "Hose" , "Polyamide" , "Artificial cloth" , "Type of material" .)