Possible Clues:

• Well protected, like armoured alibi
• Warship to press young man rounding cape
• Bulletproof FeCl commercial
• Protected warship? Frigate may be seen as such
• Like some alibis
• Well protected from cold rain pouring
• Inflexible artist keeping constant and not going back
• Absolutely determined to trade in old car
• Unassailable as one leaves sarcastic youth?
• Vessel well protected from unusually cold rain