close in for the kill
1. Literally, to approach someone or something with the intent of killing it. The lion closed in for the kill when it saw the injured antelope.
2. By extension, to approach someone or something with the intent to achieve a particular outcome. If someone finally shows interest in buying the house, I'm sure our realtor will close in for the kill.
close in for the kill
and move in for the kill 1. Lit. to move in on someone or something for the purpose of killing. The wolves closed in for the kill. When the lions closed in for the kill, the zebras began to stampede.
2. Fig. to get ready to do the final and climactic part of something. The car salesman closed in for the kill with contract and pen in hand.