The most common and most likely answer to this crossword clue is the 9 letter word LIFELINES
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More clues leading to the result LIFELINES
Buddy explains!

The straight part
We know that "Ropes" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case ropes = lifelines.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does LIFELINES mean?
LIFELINES noun- A line to which a drowning or falling victim may cling.
- (by extension) A source of salvation in a crisis.
- A means or route for transporting indispensable supplies.
- System or structure of vital importance to a community.
- On the deck of a boat, a line to which one can attach oneself to stay aboard on rough seas.
- A line from the diver to a tender at the surface control point.
- A particular crease in the palm.