Concealed by Mount Erebus going up to a nice cap (5)

I believe the answer is:

beret

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'nice cap' is the definition.
'beret' can be an answer for 'cap' (beret is a kind of cap). I am unsure of the 'nice' bit.

'concealed by mount erebus going up' is the wordplay.
'concealed by' indicates a hidden word.
'going up' is a reversal indicator.
'tereb' can be found hidden inside 'mount erebus'.
'tereb' in reverse letter order is 'BERET'.

'to a' is the link.

Can you help me to learn more?

(Other definitions for beret that I've seen before include "Soldier's cap" , "Soft round cap without a peak" , "Brimless French headgear" , "French flat hat" , "French-style cap" .)

I've seen this clue in The Irish Times.

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