Crossword Genius

Investment for ploughing back? (5)

Ross

I believe the answer is:

share

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

This might be a double definition.

'investment' is the first definition.
The answer and definition can be both acts as well as being singular nouns.
Perhaps there's an association between them I don't understand?

'ploughing back?' is the second definition.
The definition and answer can be both acts as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'for' acts as a link.

Can you help me to learn more?

(Other definitions for share that I've seen before include "Portion, allotment" , "Division" , "Divide out, apportion" , "Cutting blade" , "Allocate" .)

I've seen this clue in The Globe and Mail and The Irish News.
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