Am having a nap going up country (6)
I believe the answer is:
panama
'country' is the definition.
(I know that Panama is a country)
'am having a nap going up' is the wordplay.
'having' says to put letters next to each other.
'going up' is a reversal indicator (in a down clue, the letters are written upwards).
'am'+'a'+'nap'='amanap'
'amanap' back-to-front is 'PANAMA'.
(Other definitions for panama that I've seen before include "Hat woven from jipijapa leaves" , "country divided by boaters?" , "Hat made of plaited palm leaves" , "Country and straw hat" , "Canal state; hat" .)