Turned, rotated, having no trigger (9)
I believe the answer is:
detonator
'trigger' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
'turned rotated having no' is the wordplay.
'turned' says the letters should be written backwards.
'having' means one lot of letters goes inside another.
'rotated' going around 'no' is 'rotanoted'.
'rotanoted' backwards is 'DETONATOR'.
Can you help me to learn more?
(Other definitions for detonator that I've seen before include "small charge" , "cap" , "Explosive initiator" , "That has explosive effect" , "Explosion starter" .)