Measure of velocity of a moving Perseid (8)

I believe the answer is:

airspeed

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'measure of velocity' is the definition.
The definition suggests a singular noun which matches the answer.

'a moving perseid' is the wordplay.
'moving' indicates an anagram.
'perseid' anagrammed gives 'irspeed'.
'a'+'irspeed'='AIRSPEED'

'of' is the link.

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(Other definitions for airspeed that I've seen before include "Plane's velocity" , "rate when flying" , "rate of knots" , "Velocity of plane relative to the atmosphere" , "Measure of velocity in flight" .)

I've seen this clue in The Times.

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