Draw out information that sounds illegal (6)
I believe the answer is:
elicit
'draw out information' is the definition.
(I've seen this before)
'sounds illegal' is the wordplay.
'sounds' shows a homophone (sound like).
'illegal' becomes 'illicit' ('illicit' can be similar in meaning to 'illegal').
'illicit' sounds like 'ELICIT'.
'that' is the link.
(Other definitions for elicit that I've seen before include "Take or draw from" , "Draw out from, invoke" , "'Draw out, evoke (6)'" , "Call forth, educe" , "Evoke (a response)" .)