Crossword Genius

Left university with tot to raise -- one's usually found in bed (5)

Ross

I believe the answer is:

lupin

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'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" .)

I've seen this clue in The Telegraph.
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