Attractive thing somehow meant to contain gravity (6)
I believe the answer is:
magnet
'attractive thing' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe you can see a link between them that I don't see?
'somehow meant to contain gravity' is the wordplay.
'somehow' indicates an anagram.
'to contain' means one lot of letters goes inside another.
'gravity' becomes 'g'.
'meant' is an anagram of 'manet'.
'manet' enclosing 'g' is 'MAGNET'.
Can you help me to learn more?
(Other definitions for magnet that I've seen before include "Natural attractor" , "Attractor of iron" , "Attractive piece of metal" , "Attractive body" , "Source of attraction" .)