"Still mooing,” so to speak (4)
I believe the answer is:
rare
'still mooing so to speak' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for rare that I've seen before include "(Of meat) red" , "Scarce as hen's teeth!" , "having few matches?" , "little done?" , "Not found often" .)