Which people get the French undivided (5)
I believe the answer is:
whole
'undivided' is the definition.
('whole' can be a synonym of 'undivided')
'which people get the french' is the wordplay.
'which people' becomes 'who' (I've seen this before).
'get' says to put letters next to each other.
'the french' becomes 'le'.
'who'+'le'='WHOLE'
(Other definitions for whole that I've seen before include "undamaged" , "All the components" , "Integral" , "Entire, undivided" , "Complete, containing all the parts" .)