Clouts flying insect (6)
'insect' is the definition.
(locust is a kind of insect)
'clouts flying' is the wordplay.
'flying' indicates anagramming the letters.
'clouts' anagrammed gives 'LOCUST'.
(Other definitions for locust that I've seen before include "Swarming, destructive insect", "Voracious insect, travels in swarms", "Destructive migratory insect", "Grasshopper of warm regions", "Sturdy, resilient".)