Crossword Genius

Thinks up possible reasons for the zero increments? (9)

Ross

I believe the answer is:

theorises

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'thinks up possible reasons' is the definition.
I can't tell whether this definition defines the answer.

'the zero increments?' is the wordplay.
'zero' becomes 'O' (O resembles 0).
'increments?' becomes 'rises' (rise is a kind of increment).
'the'+'o'+'rises'='THEORISES'

'for' acts as a link.

Can you help me to learn more?

(Another definition for theorises that I've seen is " Speculates".)

I've seen this clue in the Evening Standard.
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