Left university with tot to raise -- one's usually found in bed (5)
I believe the answer is:
lupin
'one's usually found in bed' is the definition.
(plant that might be found in a flower bed)
'left university with tot to raise' is the wordplay.
'left university' becomes 'lu' (this might be a standard abbreviation which I don't know about).
'with' means one lot of letters go next to another.
'tot' becomes 'nip' (I've seen this before).
'to raise' says the letters should be written backwards (in a down clue, letters go up).
'nip' backwards is 'pin'.
'lu'+'pin'='LUPIN'
Can you help me to learn more?
(Other definitions for lupin that I've seen before include "Spiky flower" , "Pod-producing garden flower" , "Plant with erect spikes of usually purplish-blue flowers" , "9 [BLOOM]" , "bloomer" .)