Unit no longer used flag with name when temperature dropped (8,6)
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I believe the answer is:
standard candle
'unit' is the definition.
(standard candle is a kind of unit)
'no longer used flag with name when temperature dropped' is the wordplay.
I cannot really understand how this works, but
'no' could be 'n' (common abbreviation) and 'n' is present in the answer.
'with' could be 'and' and 'and' is located in the answer.
'name' could be 'dar' and 'dar' is found within the answer.
'temperature' could be 't' (abbreviation) and 't' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
I've seen this clue in The Independent.
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