Individually observed description of Polyphemus (3-4)
I believe the answer is:
one-eyed
'description of polyphemus' is the definition.
(Polyphemus is a cyclops in Greek myth)
'individually observed' is the wordplay.
'individually' becomes 'one'.
'observed' becomes 'eyed' (I've seen this before).
'one'+'eyed'='ONE-EYED'
(Other definitions for one-eyed that I've seen before include "''In the country of the blind, the . . .-. . . . man is King''" , "Like Cyclops" , "Like the Jack of spades or hearts" , "Monocular" .)