Well, Communist should be allowed to live (6)
I believe the answer is:
spared
'allowed to live' is the definition.
(as in spared from death)
'well communist' is the wordplay.
'well' becomes 'spa' (I've seen this in other clues).
'communist' becomes 'red' (red is a kind of communist).
'spa'+'red'='SPARED'
'should be' acts as a link.
(Other definitions for spared that I've seen before include "Unharmed" , "Let off by padres" , "Was merciful toward, refrained from harming" , "forgiven" , "Showed mercy, refrained from hurting" .)