Is removing its froth such a blow? (6)
I believe the answer is:
bitter
'blow?' is the definition.
The answer and definition can be both to do with perception as well as being verbs in their base form.
Perhaps they are linked in a way I don't understand?
'is removing its froth such a' is the wordplay.
I cannot quite see how this works, but
'its' could be 'it' (I've seen this in other clues) and 'it' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for bitter that I've seen before include "Beer; not sweet" , "Type of beer" , "Acerbic" , "English beer, sounds sour" , "Causing unhappiness" .)