Scattered rainfall indicators? (7)
I believe the answer is:
showers
'scattered rainfall indicators?' is the definition.
The answer and definition can be both man-made objects as well as being plural nouns.
Perhaps there's a link between them I don't understand?
'rainfall indicators?' is the wordplay.
'rainfall' becomes 'shower' (shower is a kind of rainfall).
'indicators?' becomes 's' (I can't explain this - if you can you should believe this answer much more).
'shower'+'s'='SHOWERS'
Can you help me to learn more?
(Other definitions for showers that I've seen before include "Rain spells" , "in April?" , "groups of slovenly people" , "Brief rainfalls" , "Washes over" .)