Somehow eight start hauling in sailor, showing restraint

'restraint' is the definition.
(thesaurus)

'somehow eight start hauling in sailor' is the wordplay.
I cannot really understand how this works, but
'sailor' could be 'jack' (informal term for a sailor) and 'jack' is located in the answer.
an anagram of 'eight' is 'ighte' which is within the left over letters.
an anagram of 'start' is 'strat' which is within the remaining letters.
This accounts for all the letters.
This explanation may well be incorrect...

'showing' acts as a link.

Can you help me to learn more?