Like a bone? Please help yourself (6)
I believe the answer is:
osteal
'like a bone?' is the definition.
(I know this)
'please help yourself' is the wordplay.
'please' becomes 'o' (form of address eg in an ode).
'help yourself' becomes 'steal' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'o'+'steal'='OSTEAL'
Can you help me to learn more?
(Other definitions for osteal that I've seen before include "of bones" , "skeleton may be thus described" , "Relating to bone - so late (anag)" , "made of bone" , "Bony" .)