Master's large pocket (5)

I believe the answer is:

learn

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

'large pocket' is the wordplay.
'large' becomes 'L' (eg in clothes sizes).
'pocket' becomes 'earn' (I've seen this in another clue).
'l'+'earn'='LEARN'

(Other definitions for learn that I've seen before include "Study (at school?)" , "Acquire information" , "Study or digest" , "Read up on" , "Take in" .)

I've seen this clue in The Telegraph.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.