Doctor who ensured push came to shove? (5)

I believe the answer is:

roget

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

'doctor' is the definition.
(I know that Roget is a doctor)

I don't understand how the remainder of the clue works.

(Other definitions for roget that I've seen before include "man of many words" , "Thesaurus creator" , "Thesaurus maker" , "lexicographer" , "Thesaurus inventor" .)

I've seen this clue in the Sydney Morning Herald.

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.