Cat in middle of well is in awkward position (5)

I believe the answer is:

felix

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'cat' is the definition.
Both the answer and definition are singular nouns.
Maybe there's a link between them I don't understand?

'middle of well is in awkward position' is the wordplay.
'middle of' says to take the centre.
'is in' means one lot of letters goes inside another.
'awkward position' becomes 'fix' (fixing is a kind of positioning. I am not sure about the 'awkward' bit.).
The centre of 'well' is 'el'.
'el' going within 'fix' is 'FELIX'.

'in' is the link.

Can you help me to learn more?

(Other definitions for felix that I've seen before include "Chap" , "M. name, literally happy" .)

I've seen this clue in The Globe and Mail.

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