Pick up where true peace breaks out after war's end (10)
I believe the answer is:
recuperate
'pick up' is the definition.
(thesaurus)
'true peace breaks out after war's end' is the wordplay.
'breaks out' is an anagram indicator.
'after' says to put letters next to each other.
'end' says to take the final letters.
The final letter of 'war' is 'r'.
'true'+'peace'='truepeace'
'truepeace' with letters rearranged gives 'ecuperate'.
'ecuperate' after 'r' is 'RECUPERATE'.
'where' is the link.
(Other definitions for recuperate that I've seen before include "Recover from an illness" , "Rally, recover" , "Convalesce" , "Get better" .)