Welcome me back to stay (7)
I believe the answer is:
embrace
'welcome' is the definition.
(I've seen this before)
'me back to stay' is the wordplay.
'back' shows that the letters should be reversed in order.
'to stay' becomes 'brace' (I can't explain this - if you can you should believe this answer much more).
'me' written backwards gives 'em'.
'em'+'brace'='EMBRACE'
Can you help me to learn more?
(Other definitions for embrace that I've seen before include "Include (in one's arms)" , "willingly take" , "Accept; hold closely" , "Hold tightly in the arms" , "Hold in one's arms" .)