Attractive not to lose everything (7)
I believe the answer is:
winsome
'attractive' is the definition.
(similar in meaning)
'not to lose everything' is the wordplay.
'not to lose' becomes 'win' ('win' is the opposite to 'lose').
'everything' becomes 'some' (I can't explain this - if you can you should believe this answer much more).
'win'+'some'='WINSOME'
Can you help me to learn more?
(Other definitions for winsome that I've seen before include "Attractive and appealing" , "Appealingy attractive" , "Pleasant" , "Attractive and fresh" , "Attractive, engaging" .)