Conventional Tory with deepest constituents (11)
I believe the answer is:
stereotyped
'conventional' is the definition.
('stereotyped' can be similar in meaning to 'conventional')
'tory with deepest constituents' is the wordplay.
'with' says to put letters next to each other.
'constituents' is an anagram indicator.
'tory' put after 'deepest' is 'deepesttory'.
'deepesttory' is an anagram of 'STEREOTYPED'.
(Other definitions for stereotyped that I've seen before include "Conforming to a stock image" , "Conforming to stock idea" , "Hackneyed" , "cast as nutty professor, say" , "Tired" .)