Hernando's "Huh?" (4)
I believe the answer is:
como
'hernando's huh?' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for como that I've seen before include "See 12" , "Not Italy's biggest lake" , "lake resort" , "Town and lake in north Italy" , "North Italian lake" .)