Drifter caught deafening. . . (5)
I believe the answer is:
cloud
'drifter' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
'caught deafening' is the wordplay.
'caught' becomes 'c' (cricket abbreviation).
'deafening' becomes 'loud' (similar in meaning).
'c'+'loud'='CLOUD'
Can you help me to learn more?
(Other definitions for cloud that I've seen before include "Dull spot" , "Source of rain" , "Mass of water droplets" , "Cumulus, for example" , "Obscure" .)