Actor has no right in horticultural plot (5)

I believe the answer is:

gaden

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'right in horticultural plot' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'actor has no' is the wordplay.
'actor' becomes 'gade' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'has' says to put letters next to each other.
'no' becomes 'n' (common abbreviation y/n).
'gade'+'n'='GADEN'

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

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