Line about seizing opportunity (4)
I believe the answer is:
rope
'line' is the definition.
(rope is a kind of line)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for rope that I've seen before include "A thick strong cord" , "will it bring in easy money when old?" , "String of pearls, say" , "'Cable, cord (4)'" , "Length of material used to tie or secure things" .)