Embarrassed with fake source of Ethiopian coffee popping up (10)
I believe the answer is:
shamefaced
'embarrassed' is the definition.
(I've seen this before)
'fake source of ethiopian coffee popping up' is the wordplay.
'fake' becomes 'sham' (sham can mean fake or pretend).
'source of' says to take the initial letters.
'coffee' becomes 'decaf' (type of coffee).
'popping up' shows that the letters should be reversed in order (in a down clue, letters go up).
The initial letter of 'ethiopian' is 'e'.
'decaf' in reverse letter order is 'faced'.
'sham'+'e'+'faced'='SHAMEFACED'
'with' is the link.
(Other definitions for shamefaced that I've seen before include "Sheepish" , "Red" , "became conscience-stricken" , "Showing guilty embarrassment" , "Looking guilty" .)