Crossword Genius

Trainee, irritated about poor payment initially, acquires some craftsmanship... He learns on the job (10)

Ross

I believe the answer is:

apprentice

I'm a little stuck... Click here to teach me more about this clue!

'trainee' is the definition.
(I've seen this before)

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for apprentice that I've seen before include "Learner" , "new worker" , "Trainee" , "student" , "Novice" .)

I've seen this clue in The Hindu.
Want a hint initially instead of a full solution? Install my app