Here are the possible solutions for they have cones clue
Answer
Clue
Relevancy
firs
Clue
They have cones
Definition
FIR, an evergreen tree
eyes
Clue
They hold rods and cones
Definition
EYE, to watch closely
retinae
Clue
They hold cones
Definition
RETINA, (Latin) a membrane of the eye
retinas
Clue
They contain cones
Definition
RETINA, (Latin) a membrane of the eye
newt
Clue
Gingrich who said "females have biological problems staying in a ditch for thirty days because they get infections and they don't have upper body strength"
Definition
a tailed amphibian of the salamander family, also EWT
