Greek letter that looks like a P (3)
I believe the answer is:
rho
'greek letter that looks like a p' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for rho that I've seen before include "Gr. letter written as P" , "17th Greek letter" , "Seventeenth letter of the Greek alphabet" , "Something like 25 [ETA]" , "Greek P" .)