Lion country! (7)
I believe the answer is:
england
'lion country' is the definition.
'england' can be an answer for 'country' (country of the United Kingdom). I'm unsure of the 'lion' bit.
'lion country' is the wordplay.
'lion' becomes 'eng' (I can't explain this - if you can you should give a lot more credence to this answer).
'country' becomes 'land' (synonyms).
'eng'+'land'='ENGLAND'
Can you help me to learn more?
(Other definitions for england that I've seen before include "Lend nag (anag)" , "' - - expects' (Nelson)" , "Division of Great Britain" , "1A 30 [TEST TEAM]" , "Largest country in the UK" .)