'To give a handle' definitions:

Definition of 'To give a handle'

From: GCIDE

Handle \Han"dle\, n. [AS. handle. See Hand.]
1. That part of vessels, instruments, etc., which is held in the hand when used or moved, as the haft of a sword, the knob of a door, the bail of a kettle, etc. [1913 Webster]
2. That of which use is made; the instrument for effecting a purpose; a tool. --South. [1913 Webster]
To give a handle, to furnish an occasion or means. [1913 Webster]