Band maintaining safety in an estate, say (4,4)
I believe the answer is:
Here is my best explanation:
'safety in an estate say' is the definition.
'seat belt' can be an answer for 'safety' (thesaurus). I'm not sure about the 'in an estate say' bit.
'band maintaining' is the wordplay.
I cannot really understand how this works, but
'band' could be 'belt' (I've seen this before) and 'belt' is found in the answer.
The remaining letters 'seat' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...