Can move in last to show stamina (9)
I believe the answer is:
endurance
'stamina' is the definition.
(I know that stamina can be written as endurance)
'can move in last' is the wordplay.
'move' indicates anagramming the letters.
'in' is an insertion indicator.
'last' becomes 'endure' (enduring is a kind of lasting).
'can' is an anagram of 'anc'.
'anc' put within 'endure' is 'ENDURANCE'.
'to show' acts as a link.
(Other definitions for endurance that I've seen before include "Bearing" , "Patient suffering" , "Stoicism" , "Showing ablity to last" , "Stoical attitude" .)