Positioned student and walked round (6)
I believe the answer is:
placed
'positioned' is the definition.
('place' can be a synonym of 'position')
'student and walked round' is the wordplay.
I cannot really understand how this works, but
'student' could be 'l' (as in L-plates for learner drivers) and 'l' is located in the answer.
'walked' could be 'paced' (pacing is a kind of walking) and 'paced' is located in the remaining letters.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for placed that I've seen before include "Positioned" , "Came second or third" , "Put in position" , "Put, situated" , "Set" .)