Consequence of complete change of attitude, giving up salt (7)
I believe the answer is:
outturn
'consequence' is the definition.
(outturn can mean something's result or consequence)
'complete change of attitude giving up salt' is the wordplay.
'complete change of attitude' becomes 'about-turn' (reversal of opinion or policy).
'giving up' indicates named letters should be taken away.
'salt' becomes 'ab' (both can mean a sailor).
'aboutturn' with 'ab' taken out is 'OUTTURN'.
'of' is the link.
(Other definitions for outturn that I've seen before include "Result of work or activity - turn out for it" , "Result, consequence" , "Quantity produced; result of events" .)