Possible Clues:

• Lily gets swamped by sea of projectiles
• To do with the flight of projectiles - basic lilt (anag)
• Round is the jerk of this missle
• Fifty is what makes this a missile in the sea
• It gets around and sounds as if it is in time for the missile
• Winsome deer
• What''s round is twitchy with a missile
• For this sort of missile, it seems that L is in the sea
• Fifty's what's got into the sea by way of a missile
• The orb's a jerk, by the sound of it, for one sort of weapon