Plant business with meagre capital backing (12)

I believe the answer is:

tradescantia

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'plant business with meagre capital backing' is the definition.
'tradescantia' can be an answer for 'plant' (I've seen this before). I'm not certain of the 'business with meagre capital backing' bit.

'business with meagre capital backing' is the wordplay.
'business' becomes 'trade' (trade is a kind of business).
'with' says to put letters next to each other.
'meagre' becomes 'scant' (similar in meaning).
'capital backing' becomes 'ia' (I can't justify this - if you can you should give a lot more credence to this answer).
'trade'+'scant'+'ia'='TRADESCANTIA'

Can you help me to learn more?

(Other definitions for tradescantia that I've seen before include "Common houseplant" , "Common house plant" , "Spiderwort genus" .)

I've seen this clue in The Independent.

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