Crossword Genius

Great act of generosity gives away odd bits to sister (5)

Ross

I believe the answer is:

large

'great' is the definition.
(I know that great can be written as large)

I cannot understand how the rest of the clue works.

(Other definitions for large that I've seen before include "Regal (anag)" , "broad" , "Strapping" , "Vast" , "Bumper" .)

I've seen this clue in The Independent.
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.