Force conversation for the audience (6)
I believe the answer is:
torque
'force' is the definition.
(torque is a kind of force)
'conversation for the audience' is the wordplay.
'conversation' becomes 'talk' (talk is a kind of conversation).
'for the audience' shows a homophone (sound like).
'talk' is a homophone of 'TORQUE'.
(Other definitions for torque that I've seen before include "Force causing rotation in mechanism" , "Rotational force; necklace" , "Necklace of twisted metal" , "Rotational force; roquet (anag.)" , "Twisted metalwork" .)