Craft content to leave crabber throwing line out at the end (7)
I believe the answer is:
crochet
'craft' is the definition.
(I know that crochet is a craft)
'content to leave crabber throwing line out at the end' is the wordplay.
'content to leave' suggests removing the centre (the contents of the word are removed).
'throwing line' becomes 'oche' (line where darts players stand).
'at the end' suggests the final letters.
'crabber' with its centre taken out is 'cr'.
The last letter of 'out' is 't'.
'cr'+'oche'+'t'='CROCHET'
(Other definitions for crochet that I've seen before include "Work yarn with hook" , "working with hook and loops" , "Decorative needlework using hooks" , "Craft product" , "Type of needlework" .)