Possible Clues:

• Held a climber's rope
• Secured while rock climbing
• Fixed, as a climber's rope
• Secured, as a sailor's rope
• "Pipes had found it very hard to keep him fast —" (Smollett, Peregrine Pickle)
• Fastened, as a rope
• Bets should, we're told, when made fast
• Secured a climber's rope