So loveless and still very young (5)
I believe the answer is:
seven
'very young' is the definition.
Both the definition and answer are adjectives. Maybe they are linked in a way I don't understand?
'so loveless and still' is the wordplay.
'so loveless' becomes 's' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'and' means one lot of letters go next to another.
'still' becomes 'even' (synonyms).
's'+'even'='SEVEN'
Can you help me to learn more?
(Other definitions for seven that I've seen before include "VII" , "- Against Thebes (Aeschylus)" , "Number of seas sailed?" , "Cardinal" , "Prime number" .)