Question

merchant of Venice
Act 1 scene 3...

Answer 1

He might be meaning some kind of demand

Answer 2

Heya friend,
____________________________________The present want refers to the wants of Bassanio that is three thousand ducats to woo Portia.
He had borrowed the money from Shylock by bounding Antonio . Shylock said that if A Antonio failed to repay on the stipulated day one pound of flesh would be taken from any part of the body he(Shylock) wants.
Hopes this helps you.