Is half of North African dish underneath very sticky? (7)
I believe the answer is:
viscous
'sticky?' is the definition.
('viscous' can be a synonym of 'sticky')
'is half of north african dish underneath very' is the wordplay.
'half of' means to take half the letters.
'north african dish' becomes 'couscous' (I've seen this before).
'underneath' is a charade indicator (letters next to each other) (in a down clue, some letters go under others).
'very' becomes 'v' (abbreviation).
'couscous' halved is 'cous'.
'is'+'cous'='iscous'
'iscous' put after 'v' is 'VISCOUS'.
(Other definitions for viscous that I've seen before include "Thick, sticky (liquid)" , "Treacly" , "'Glutinous, sticky (7)'" , "Gelatinous" , "Thick and gluey, like heavy oil" .)