Being decorative, is carefully drawn (4)
I believe the answer is:
bead
'being decorative is carefully drawn' is the definition.
I can't judge whether this defines the answer.
'is carefully drawn' is the wordplay.
'is' becomes 'be'.
'carefully drawn' becomes 'ad' (I can't justify this - if you can you should give a lot more credence to this answer).
'be'+'ad'='BEAD'
Can you help me to learn more?
(Other definitions for bead that I've seen before include "Round piece of glass, etc" , "Necklace piece; droplet" , "Drop of liquid on a surface" , "Necklace component" , "Part of a necklace" .)