Dic: sew up, get(have)~sewn up

2. PHRASAL VERB

If someone sews up something such as a business deal, an election, or a game, they make sure that they will get the result they want.[INFORMAL]

• If they didn't move fast, Johnson could sew this deal up within days.
• The Italians think they've got it all sewn up.

... Cobuild

sewed(sewn) up :

1. Lit. [the sewing of a gap in cloth] completed. (Typically: get something ~; have something ~.)

• Have you got that tear sewed up yet?

2. also wrapped up Fig. settled or finished. (Typically: get something ~; have something ~.)

• I'll take the contract to the mayor tomorrow morning. I'll get the whole deal sewed up by noon.
• Don't worry about the car loan. I'll have it wrapped up in time to make the purchase.

sew someone or something up :

1. Lit. to stitch together an opening in someone or something.

• The surgeon sewed the patient up and pronounced the operation a success.
• This is torn. Can you sew up this rip?

2. Fig. to complete one's dealings with or discussion of someone or something.

• It's time to sew this up and go home.
• I think we can sew up the shipping contract this afternoon and get on to someone else.
• Let's sew up this last matter and go.

... McGraw-Hill Dictionary of American Idioms and Phrasal Verb,

http://idioms.thefreedictionary.com/sew