Ruminate about source included by British academic (5,2)

I believe the answer is:

dwell on

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

'source included by british academic' is the definition.
I can't tell whether this defines the answer.

'ruminate about' is the wordplay.
'ruminate' becomes 'dwell' (dwelling is a kind of ruminating).
'about' becomes 'on' (as in a book 'on' a certain topic).
'dwell'+'on'='DWELL ON'

Can you help me to learn more?

(Other definitions for dwell on that I've seen before include "Speak at length about" , "Mull over" , "Linger over" , "Ponder about" , "Think at length about" .)

I've seen this clue in The Irish Times.

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.