Ninth flatted tag for the worker on a plane (6,9)
I believe the answer is:
flight attendant
'worker on a plane' is the definition.
'flight attendant' can be an answer for 'worker' (flight attendant is a kind of worker). I am not certain of the 'on a plane' bit.
'ninth flatted tag for' is the wordplay.
'ninth flatted tag' can be anagrammed to 'FLIGHT ATTENDANT'.
Though, I'm not sure how this is indicated.
'the' acts as a link.
Can you help me to learn more?
(Another definition for flight attendant that I've seen is " help on lines".)