One in a growing business, a baby-minder? (10)
I believe the answer is:
nurseryman
'one' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
'a growing business a baby-minder?' is the wordplay.
I cannot quite see how this works, but
'a' could be 'an' and 'an' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
'in' acts as a link.
Can you help me to learn more?
(Other definitions for nurseryman that I've seen before include "fellow whose charges are small?" , "Gardener" , "One who grows plants" , "one's growing business" , "Worker rearing plants" .)