Schoolkid on vacation trapping brown bear (5)
I believe the answer is:
stand
'bear' is the definition.
('stand' can be a synonym of 'bear')
'schoolkid on vacation trapping brown' is the wordplay.
'on vacation' suggests removing the centre.
'trapping' indicates putting letters inside.
'brown' becomes 'tan' (tan is a kind of brown).
'schoolkid' with its centre taken out is 'sd'.
'sd' going around 'tan' is 'STAND'.
(Other definitions for stand that I've seen before include "Remain unaltered, tolerate" , "Seek election; attitude" , "Platform; attitude" , "group of trees" , "Sit here at a sports event" .)