I've a rod to use on he who prevaricates (7)

I believe the answer is:

avoider

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'he who prevaricates' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.

'i've a rod to use' is the wordplay.
'to use' indicates an anagram (I've seen 'using' mean this (the letters used in a different way)).
'ive'+'a'+'rod'='ivearod'
'ivearod' with letters rearranged gives 'AVOIDER'.

'on' acts as a link.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

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