Crossword Genius

Father suggests it's up to me (4)

Ross

I believe the answer is:

time

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'father' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.

'it's up to me' is the wordplay.
'up' is a reversal indicator (in down clue: letters go upwards).
'it' written backwards gives 'ti'.
'ti'+'me'='TIME'

'suggests' acts as a link.

Can you help me to learn more?

(Other definitions for time that I've seen before include "It's measured by watch or clock" , "See 12" , "Continuum of past, present and future" , "Procrastination is the thief of ." , "Rhythm" .)

I've seen this clue in the Evening Standard.
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