The cleverness of Arctic people concealing information on source of yoghurt (9)
I believe the answer is:
ingenuity
'the cleverness' is the definition.
('ingenuity' can be a synonym of 'cleverness')
'arctic people concealing information on source of yoghurt' is the wordplay.
'arctic people' becomes 'inuit' (I've seen this before).
'concealing' is an insertion indicator.
'information' becomes 'gen' (gen is a kind of information).
'on' is a charade indicator (letters next to each other).
'source of' says to take the initial letters.
The initial letter of 'yoghurt' is 'y'.
'inuit' placed around 'gen' is 'ingenuit'.
'ingenuit'+'y'='INGENUITY'
'of' is the link.
(Other definitions for ingenuity that I've seen before include "Cleverness" , "skill" , "Inventiveness" , "invention" .)