Secure though not all together (3)
I believe the answer is:
get
'secure' is the definition.
(thesaurus)
'not all together' is the wordplay.
'not all' indicates a hidden word.
'GET' can be found hidden inside 'together'.
'though' acts as a link.
(Other definitions for get that I've seen before include "Escape" , "Receive; obtain" , "Fetch or obtain" , "See 18" , "Procure from vegetables" .)