It bubbles forth somehow (5)
I believe the answer is:
froth
'it bubbles' is the definition.
The definition suggests a singular noun which matches the answer.
'forth somehow' is the wordplay.
'somehow' is an anagram indicator.
'forth' anagrammed gives 'FROTH'.
Can you help me to learn more?
(Other definitions for froth that I've seen before include "Mass of small bubbles" , "Small bubbles on a liquid" , "Spume or foam" , "Lather" , "Effervesce" .)