Hasty and superficial thus included in spicy dish (7)
I believe the answer is:
cursory
'hasty and superficial' is the definition.
(I've seen this before)
'thus included in spicy dish' is the wordplay.
'thus' becomes 'so' (synonyms).
'included in' indicates putting letters inside.
'spicy dish' becomes 'curry' (I've seen this before).
'so' placed into 'curry' is 'CURSORY'.
(Other definitions for cursory that I've seen before include "Hasty, not thorough" , "Hasty and superficial" , "Hasty and without attention" , "Superficial - ours cry (anag)" , "Like a quick examination" .)