He gives new exit outside (5)
I believe the answer is:
donor
'he gives' is the definition.
(I've seen this before)
'new exit outside' is the wordplay.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'exit' becomes 'door' (I've seen this in another clue).
'outside' is an insertion indicator (some letters go outside others).
'n' put into 'door' is 'DONOR'.
(Other definitions for donor that I've seen before include "Philanthropist" , "Charitable giver" , "Organ giver?" , "A giver, often of blood" , "One who gives something" .)