Fellow about to take work in line (3,4)

'line' is the definition.
(I know that guy rope is a type of rope)

'fellow about to take work' is the wordplay.
'fellow' becomes 'guy' (both can mean a man).
'about to' becomes 're' (I am not sure about this - if you are sure you should believe this answer much more).
'take' means one lot of letters goes inside another.
'work' becomes 'op' (common abbreviation for 'opus').
're' enclosing 'op' is 'rope'.
'guy'+'rope'='GUY-ROPE'

'in' is the link.

Can you help me to learn more?