Crossword Genius

One a policeman may have to nab, possibly? (5)

Ross

I believe the answer is:

baton

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

'one a policeman may' is the definition.
I can't judge whether this definition defines the answer.

'to nab possibly?' is the wordplay.
'possibly?' indicates an anagram (I've seen 'possibly' mean this).
'to'+'nab'='tonab'
'tonab' with letters rearranged gives 'BATON'.

'have' is the link.

Can you help me to learn more?

(Other definitions for baton that I've seen before include "Conductor's rod" , "Relay runner's stick" , "A stick for a conductor and policeman" , "It's used by a conductor and a policeman" , "Prohibition" .)

I've seen this clue in the Evening Standard.
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