Be careful - it's said to be booby-trapped (4)
'be careful' is the definition.
I can't judge whether this defines the answer.
'said to be booby-trapped' is the wordplay.
'said to be' shows a homophone (sound like).
'booby-trapped' becomes 'mined' (I've seen this in another clue).
'mined' sounds like 'MIND'.
'it's' acts as a link.
Can you help me to learn more?
(Other definitions for mind that I've seen before include "Take care of; intellect" , "Inclination" , "Take offence (at)" , "Brain" , "Watch - intellect" .)
'be booby-trapped' is the definition.
(I've seen this in another clue)
'be careful it's said' is the wordplay.
I cannot really see how this works, but
'it' could be 'e' ('e' can mean 'electronic' which is similar to 'IT') and 'e' is found in the answer.
The remaining letters 'mind' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'to' acts as a link.
Can you help me to learn more?
(Other definitions for mined that I've seen before include "Dug from pit" , "proceeded secretly" , "Placed charges" , "Extracted minerals from the earth" , "laid eggs" .)