White lies disseminated in gang (8)
I believe the answer is:
riesling
'white' is the definition.
(I've seen this before)
'lies disseminated in gang' is the wordplay.
'disseminated' indicates an anagram.
'in' indicates putting letters inside.
'gang' becomes 'ring' ('ring' can be a synonym of 'gang'**).
'lies' anagrammed gives 'iesl'.
'iesl' placed within 'ring' is 'RIESLING'.
(Other definitions for riesling that I've seen before include "Strange wine for Sir Ingle" , "Dry white wine (German)" , "German/Austrian wine" , "Fragrant white wine from the Rhine valley or from California" , "Sir Ingle makes wine from this grape" .)