So loveless, the viper's relatively unhappy (6)
I believe the answer is:
sadder
'relatively unhappy' is the definition.
I can't tell whether this definition defines the answer.
'so loveless the viper's' is the wordplay.
'so loveless' becomes 's' (I can't explain this - if you can you should believe this answer much more).
'the viper' becomes 'adder' (adder is a kind of viper).
's'+'adder'='SADDER'
Can you help me to learn more?
(Other definitions for sadder that I've seen before include "More unhappy (but hopefully 1 down)" , "More downcast" , "Gloomier" , "extra-blue?" , "more blue" .)
