Kind of pin in joint use (5)

I believe the answer is:

dowel

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'kind of pin' is the definition.
'dowel' can be an answer for 'pin' (peg for fixing together components of a structure). I'm not sure about the 'kind of' bit.

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for dowel that I've seen before include "Fastening peg for joint" , "Peg for joining wood" , "Pole" , "Wooden peg" , "Peg to hold two pieces together" .)

I've seen this clue in the Evening Standard.

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