Don't let the others inherit - I'll see to it (5,2,2,2)

'i'll see to it' is the definition.

'don't let the others inherit' is the wordplay.
I cannot quite understand how this works, but
'let' could be 'leave' (synonyms) and 'leave' is present in the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is located in the answer.
This may be the basis of the clue (or it may be nonsense).