Crossword Genius

A month in place — certainly a winner (4,3)

Ross

I believe the answer is:

safe bet

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

'certainly a winner' is the definition.
I can't tell whether this definition defines the answer.

'a month in place' is the wordplay.
'month' becomes 'Feb' (abbreviation for February).
'in' means one lot of letters goes inside another.
'place' becomes 'set' (synonyms).
'a'+'feb'='afeb'
'afeb' placed inside 'set' is 'SAFE BET'.

Can you help me to learn more?

(Another definition for safe bet that I've seen is " Risk-free risk?".)

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