It is progressively conservative—or conservatively progressive.
"So I have been informed," Mr. Hicks replied, conservatively.
The citations in the text have been conservatively modernised.
"I believe that's the idea," said the Cap'n, conservatively.
The change you desire you work for conservatively, if at all.
Conservatively dressed—matching coat and trousers of orange nylon tweed—royal blue half-brim bowler—carrying a blue brief case.
"Yes, I not only know who he is, but have a slight personal acquaintance with him," I said conservatively.
He never stood up for his notions in the face of conservatively indignant people.
Mr. T. Oh, no, merely a dignified age for a girl so conservatively reared as Hilda has been.
The Persian poets not only conservatively followed old metres, but old similes, old subjects as well.