Crossword Clue:

Periscope part

Answer	Crossword Clue
PRISM	Periscope part
LENS	Periscope part
MIRROR	Periscope part

ARMYTANKS	Periscope users
LENS	Periscope piece
SUB	Periscope site
LENS	Periscope component
PRISMS	Periscope parts
SPY	Use a periscope
MILKCARTON	Kid's periscope, perhaps
PEERSAT	Views through a periscope, say

SUBTOKEN	Periscope lens kept as a souvenir?
SEGA	Maker of the old arcade game Periscope
YELLSUBMARINE	What to do when you spot a periscope?