Clue: Commercial bush, petal trained by worker, / reverse of ideal along­side border plant-forms in art (8, 8)
Answer: TEA PLANT/ANTHEMIA
Explanation: Definition: plant-forms in art
HEM + A1<. / PETAL*+ ANT. This is the two-word answer mentioned in the preamble (I had to check whether it was this or TRASHCAN: Chambers gives the latter as one word)