This puzzle has 78 (5)
I believe the answer is:
clues
'this puzzle has 78' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for clues that I've seen before include "Hints (that you're looking at?)" , "Indications" , "Here, they're across and down" , "Crossword aids" .)