Head of languages getting extremely upset during squabble with servile flatterer (10)
I believe the answer is:
bootlicker
'flatterer' is the definition.
(bootlicker is a kind of flatterer)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for bootlicker that I've seen before include "Sycophant" , "Ingratiating type" , "who may ensure that tongues meet" , "Toady" .)