She puts decoration into the new age (5)
I believe the answer is:
gemma
'she' is the definition.
Both the answer and definition are singular nouns.
Maybe there's a link between them I don't understand?
'decoration into the new age' is the wordplay.
'decoration' becomes 'mm' (I can't explain this - if you can you should believe this answer much more).
'into' means one lot of letters goes inside another.
'the new' indicates an anagram.
'age' is an anagram of 'gea'.
'mm' put within 'gea' is 'GEMMA'.
'puts' is the link.
Can you help me to learn more?
(Other definitions for gemma that I've seen before include "girl" , "Bud" , "Girl's name" .)