They reveal themselves to be thoroughly reprehensible lots! (7)
I believe the answer is:
showers
'thoroughly reprehensible lots' is the definition.
The answer and definition can be both man-made objects as well as being plural nouns.
Maybe there's a link between them I don't understand?
'they reveal themselves' is the wordplay.
I cannot quite see how this works, but
'reveal' could be 'show' ('show' can be a synonym of 'reveal') and 'show' is located in the answer.
The remaining letters 'ers' is a valid word which might be clued in a way I don't understand.
This may be the basis of clue (or it may be nonsense).
'to be' is the link.
Can you help me to learn more?
(Other definitions for showers that I've seen before include "Spots of rain" , "Wet weather" , "Short falls of rain" , "Exhibitionists" , "groups of slovenly people" .)