Working in country, live over lake (6)
I believe the answer is:
usable
'working' is the definition.
(I've seen this in another clue)
'country live over lake' is the wordplay.
'country' becomes 'usa' (USA is an example).
'live' becomes 'be' (synonyms).
'over' means one lot of letters goes inside another.
'lake' becomes 'L' (geographical abbreviation).
'be' placed around 'l' is 'ble'.
'usa'+'ble'='USABLE'
'in' acts as a link.
(Other definitions for usable that I've seen before include "open to exploitation" , "Of potential utility" , "Fit for service" , "at one's disposal" , "Serviceable" .)