Undisciplined he-man ties sailor's rope (9)
I believe the answer is:
mainsheet
'sailor's rope' is the definition.
'mainsheet' can be an answer for 'rope' (I've seen this before). I'm not certain of the 'sailor's' bit.
'undisciplined he-man ties' is the wordplay.
'undisciplined' indicates anagramming the letters.
'he'+'man'+'ties'='hemanties'
'hemanties' anagrammed gives 'MAINSHEET'.
Can you help me to learn more?
(Other definitions for mainsheet that I've seen before include "Some tackle" , "front page?" , "Crafty line" , "Nautical rope" , "rope found on board" .)