College worker starts to hustle for a flower (10)

I believe the answer is:

polyanthus

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'a flower' is the definition.
The definition and answer can be both plants as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

'college worker starts to hustle for' is the wordplay.
'college' becomes 'poly' (polytechnic).
'worker' becomes 'ant' (worker is a type of ant).
'starts' means to remove the last letter.
'to hustle for' becomes 'thus' (I am not sure about this - if you are sure you should believe this answer much more).
'ant' with its final letter taken off is 'an'.
'poly'+'an'+'thus'='POLYANTHUS'

Can you help me to learn more?

(Other definitions for polyanthus that I've seen before include "Bloomer" , "plant" .)

I've seen this clue in The Daily Express.

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