New cola? Right: that is item of interest to slimmers (7)

I believe the answer is:

calorie

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'item of interest to slimmers' is the definition.
I can't judge whether this defines the answer.

'new cola? right that is' is the wordplay.
'new' indicates an anagram.
'right' becomes 'r' (abbreviation).
'that is' becomes 'ie' (short for Latin 'id est', 'that is').
'cola' with letters rearranged gives 'calo'.
'calo'+'r'+'ie'='CALORIE'

Can you help me to learn more?

(Other definitions for calorie that I've seen before include "generating a bit of heat" , "Unit of heat (concerned with diet)" , "Unit of energy in foods" , "Unit of heat energy" , "A recoil (anag.)" .)

I've seen this clue in The Times.

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