Can, in need, find sobriety (10)
I believe the answer is:
abstinence
'sobriety' is the definition.
(thesaurus)
'can in need' is the wordplay.
'can' becomes 'tin' ('tin' can be a synonym of 'can').
'in' indicates putting letters inside.
'need' becomes 'absence' (I've seen this before).
'tin' put inside 'absence' is 'ABSTINENCE'.
'find' acts as a link.
(Other definitions for abstinence that I've seen before include "giving it up" , "The avoidance of alcohol" , "Temperance" , "Not drinking" , "Self-denial" .)