Outdated proposal of law used for the Met? (3,4)
I believe the answer is:
old bill
'for the met?' is the definition.
(I've seen this before)
'outdated proposal of law' is the wordplay.
I cannot quite see how this works, but
'outdated' could be 'old' (I've seen this in another clue) and 'old' is found within the answer.
'proposal' could be 'bill' (I have seen 'parliamentary proposal' mean 'bill' so perhaps 'proposal' could also mean 'bill') and 'bill' is present in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'used' is the link.
Can you help me to learn more?
(Other definitions for old bill that I've seen before include "previous charges" , "Cops" , "forgotten account" , "evidence of previous appearances in theatre" , "British Bobby" .)