Left organisation, for example, over Spring (5)
I believe the answer is:
lunge
'spring' is the definition.
(thesaurus)
'left organisation for example over' is the wordplay.
'left organisation' becomes 'lun' (I can't explain this - if you can you should give a lot more credence to this answer).
'for example' becomes 'eg' (short for 'exempli gratia', 'for example' in Latin).
'over' shows that the letters should be reversed in order.
'eg' written backwards gives 'ge'.
'lun'+'ge'='LUNGE'
Can you help me to learn more?
(Other definitions for lunge that I've seen before include "sudden movement forwards" , "Move suddenly" , "Stab" , "Thrust forward as with sword" , "dive" .)