Growing business? Good – get firm, initially lost, to enter promotion (6,9)
I believe the answer is:
market gardening
'growing business? good' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
'get firm initially lost to enter promotion' is the wordplay.
I cannot really understand how this works, but
an anagram of 'get' is 'etg' which is present in the answer.
'enter' could be 'mark' (marking is a kind of entering) and 'mark' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for market gardening that I've seen before include "Horticultural trade" , "American trucking" .)