Gunners dance about one with great happiness (8)

I believe the answer is:

radiance

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'great happiness' is the definition.
'radiance' can be an answer for 'happiness' (thesaurus). I am not certain of the 'great' bit.

'gunners dance about one' is the wordplay.
'gunners' becomes 'RA' (Royal Artillery).
'about' means one lot of letters goes inside another.
'one' becomes 'i' (Roman numeral).
'dance' placed around 'i' is 'diance'.
'ra'+'diance'='RADIANCE'

'with' is the link.

Can you help me to learn more?

(Other definitions for radiance that I've seen before include "A bright glow (E, not Y)" , "Glow (of good health?)" , "Brilliance of glow" , "Effulgence" , "moonlight" .)

I've seen this clue in The Irish News.

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