Possible Clues:

• How 18-, 24-, 47- and 56-Across may be defined
• Determined one's phrase
• How piracy or villainy may be practised, somehow! (2,4,2,2,5)
• How some get things done
• Somehow definitely close to pirate gold, according to thief (2,4,2,2,5)
• However one can