Possible Clues:

• Make a mistake badly in Guam, losing male soldier
• The Italian regular struggling to become irregular
• Terrorist at gunpoint missed getting over small stream in time
• Fool without sin, one a political combatant
• Freedom fighter is an utter brute
• To lure a girl is highly irregular!
• Argue about crossing river with sick fighter
• Lure a girl out? That's irregular
• Fool one by mistake imprisoned - a political insurgent
• Short irregular line, irregularly irregular!