Bubbles beginning to seep under walls of dungeons (4)
I believe the answer is:
suds
'bubbles beginning to seep under walls of dungeons' is the definition.
I can't judge whether this defines the answer.
'beginning to seep under walls of dungeons' is the wordplay.
'beginning to' suggests taking the first letters.
'walls of' suggests removing the centre (only the edge letters remain).
'dungeons' with its middle taken out is 'ds'.
The initial letters of 'seep under' is 'su'.
'su'+'ds'='SUDS'
Can you help me to learn more?
(Other definitions for suds that I've seen before include "Lathery bubbles" , "Soap bubbles; scum" , "Soapy froth" , "Soapy water" , "Froth of soap and water" .)