New batter collects one special cap (7)

I believe the answer is:

biretta

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

'special cap' is the definition.
'biretta' can be an answer for 'cap' (biretta is a kind of cap). I'm unsure of the 'special' bit.

'new batter collects one' is the wordplay.
'new' is an anagram indicator.
'collects' is an insertion indicator.
'one' becomes 'i' (Roman numeral).
'batter' is an anagram of 'bretta'.
'bretta' going around 'i' is 'BIRETTA'.

Can you help me to learn more?

(Other definitions for biretta that I've seen before include "Battier (anag.)" , "that covers a Catholic priest" , "Stiff cap worn by Roman Catholic clergy" , "religious headwear" , "Cardinal's red cap" .)

I've seen this clue in The Times.

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