Energy producer held up by so many delays (6)
I believe the answer is:
dynamo
'energy producer' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.
'held up by so many delays' is the wordplay.
'up by' is a reversal indicator.
'held' indicates the answer is hidden within the clue.
'omanyd' is hidden in the letters of 'so many delays'.
'omanyd' reversed gives 'DYNAMO'.
Can you help me to learn more?
(Other definitions for dynamo that I've seen before include "Live wire" , "Device producing electrical power" , "Energy converter - hard worker" , "Generator of electricity (eg, on bicycle)" , "Source of electric current" .)