Japanese seat of learning exercises right to display tree (7)
I believe the answer is:
juniper
'tree' is the definition.
(I've seen this before)
'japanese seat of learning exercises right' is the wordplay.
'japanese' becomes 'J' (international code for Japanese vehicles).
'seat of learning' becomes 'uni' (I've seen this before).
'exercises' becomes 'pe' (Physical Education).
'right' becomes 'r' (common abbreviation).
'j'+'uni'+'pe'+'r'='JUNIPER'
'to display' acts as a link.
(Other definitions for juniper that I've seen before include "Coniferous shrub with berries used to make gin" , "Shrub flavouring gin" , "Shrub with berries used to flavour gin" , "Evergreen shrub or small tree with berry-like cones" , "kind of berries" .)