Possible Clues:

• An animal unlikely to be overlooked
• Lofty browser's tactless remark about one beginning to read
• One would have to draw a long breath
• Sixteen, mostly neck
• The beast naturally looks down on others
• The camelopard
• Faux pas about leaders of Irish Republic, one reaching highest places
• The tallest animal
• One gets little right, being involved in mistake that's beastly
• A long-legged creature, I run - blunder around