Puzzle discussion, nudges, and solution at
Nudge 1 Thee are four theme words - all entered vertically and 9 or 10 letters long.
Nudge 2 The title is important. Well, only the second word.
Nudge 3 Another way to write CLOVERS is “CL over S” . How might this apply to the title and the themers?
Nudge 4 Now do a meta-thing.
Nudge 5 Don’t blunder!