Do not disturb unaccompanied spring holidays taken retrospectively? (5,4,5)
I believe the answer is:
leave well alone
'do not disturb' is the definition.
(refrain from disturbing)
'unaccompanied spring holidays taken retrospectively?' is the wordplay.
I cannot quite understand how this works, but
'unaccompanied' could be 'alone' (synonyms) and 'alone' is found within the answer.
'spring' could be 'well' (both can mean a source of water) and 'well' is present in the answer.
'holidays' could be 'leave' and 'leave' is located in the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for leave well alone that I've seen before include "Good job Tommy Stout didn't" , "make no waves" , "Don't interfere" , "Avoid interfering" , "Draw no water" .)