Irresponsible not running a motor limiting energy (8)
I believe the answer is:
careless
'irresponsible' is the definition.
(similar in meaning)
'not running a motor limiting energy' is the wordplay.
I cannot quite see how this works, but
'not' could be 'less' (I've seen this in other clues) and 'less' is found within the answer.
'a' is within the answer.
'energy' could be 'e' (physics symbol as in E=mc2) and 'e' is found within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for careless that I've seen before include "Inattentive and negligent" , "'Heedless, unthinking (8)'" , "Incautious" , "impetuous" , "Slipshod" .)
