Tom hit strange unknown fellow (7)

I believe the answer is:

timothy

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

'tom hit strange unknown' is the wordplay.
'strange' indicates an anagram.
'unknown' becomes 'y' (algebra).
'tom'+'hit'='tomhit'
'tomhit' anagrammed gives 'timoth'.
'timoth'+'y'='TIMOTHY'

Can you help me to learn more?

(Other definitions for timothy that I've seen before include "boy" , "Companion to St.Paul; type of grass" , "Bible book" , "A grass; an NT disciple" , "A grass; two NT books" .)

I've seen this clue in The Mirror.

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