Heard shower had frequent fault when power is misused (5,2,6)
I believe the answer is:
reign of terror
'heard shower' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'frequent fault when power is misused' is the wordplay.
I cannot really see how this works, but
'frequent' could be 'oft' (I've seen this in another clue) and 'oft' is found in the answer.
'fault' could be 'error' (synonyms) and 'error' is found in the answer.
'when' could be 'e' (I've seen this in other clues) and 'e' is found in the answer.
This explanation may well be incorrect...
'had' is the link.
Can you help me to learn more?
(Other definitions for reign of terror that I've seen before include "period in French history" , "French Revolutionary experience" , "What Robespierre started" , "Period of Jacobin rule in France" , "awful time in France" .)