Web matter for discussion under Tories originally (6)
I believe the answer is:
tissue
'web' is the definition.
(thesaurus)
'matter for discussion under tories originally' is the wordplay.
'matter for discussion' becomes 'issue' (I've seen this before).
'under' means one lot of letters go next to another.
'originally' indicates taking the first letters.
The initial letter of 'tories' is 't'.
'issue' put after 't' is 'TISSUE'.
(Other definitions for tissue that I've seen before include "Maybe lies" , "Web; fabric" , "See 11" , "Fine weave" , "Absorbent paper, used as handkerchief, say" .)