For the beer drinker, it's heady stuff (5)
I believe the answer is:
froth
'heady stuff' is the definition.
The definition and answer can be both related to change as well as being verbs in their base form.
Maybe you can see a link between them that I can't see?
'for the beer drinker' is the wordplay.
I cannot really understand how this works, but
an anagram of 'for' is 'fro' which is within the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is present in the answer.
A single letter 'h' remains which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'it's' acts as a link.
Can you help me to learn more?
(Other definitions for froth that I've seen before include "Small bubbles on a liquid" , "Effervesce" , "Spume or foam" , "Lather" , "Mass of small bubbles" .)