i think he wanna really examine to great deal sakura
that's why he made a clone
now he has four eyes
2 different angle
lot of info can be gathered by that way
or the thing is that
he is suspecting sakura will do certainly something rash
and she is doing it
come out of village without any one's permission
now taking decision herself without caring about the village naruto and konoha 11
moreover creating more dangers for kiba and lee
so he hide that clone which will be very handy if anything happen wrong
that's why he made a clone
now he has four eyes
2 different angle
lot of info can be gathered by that way
or the thing is that
he is suspecting sakura will do certainly something rash
and she is doing it
come out of village without any one's permission
now taking decision herself without caring about the village naruto and konoha 11
moreover creating more dangers for kiba and lee
so he hide that clone which will be very handy if anything happen wrong