I get taken on by irritated worker making pastry (9)
I believe the answer is:
croissant
'pastry' is the definition.
(I have seen 'French pastry ' mean 'croissant' so perhaps 'pastry' could also mean 'croissant')
'i get taken on by irritated worker' is the wordplay.
'get' means one lot of letters goes inside another.
'taken on by' says to put letters next to each other.
'irritated' becomes 'cross' (I've seen this in another clue).
'worker' becomes 'ant' (worker is a type of ant).
'cross' next to 'ant' is 'crossant'.
'i' put into 'crossant' is 'CROISSANT'.
'making' acts as a link.
(Other definitions for croissant that I've seen before include "French pastry" , "Breakfast item" , "Continental breakfast crescent" , "French breakfast food" , "Breakfast roll" .)