Reversal of dreary practice critical for country (6)
I believe the answer is:
turkey
'for country' is the definition.
(Turkey is an example)
'reversal of dreary practice critical' is the wordplay.
'reversal of dreary practice' becomes 'tur' (I can't justify this - if you can you should give a lot more credence to this answer).
'critical' becomes 'key' (key can mean very important).
'tur'+'key'='TURKEY'
Can you help me to learn more?
(Other definitions for turkey that I've seen before include "Country and domesticated bird" , "A complete flop" , "hill-dwelling MC in 3 9 [THE OWL AND THE PUSSY-CAT]" , "Christmas dinner?" , "See 12" .)