Crossword puzzle clue "something poorly seen"

Feeling that you've seen something before seen something before

Something often seen on a street corner, briefly ... or, literally, something seen in each corner of this puzzle

Something poorly seen

Speak poorly of, or speak poorly

Spiro who wrote, "If you've seen one city slum, you've seen them all"

Springsteen "If you've ever seen ___ trick pony then you've seen me"

"If you've ___ seen a one-trick pony, then you've seen me"

"If you haven't seen ___, you haven't seen New York" (old ad slogan)