Spend time inside bank after door locks quietly (2,8)
I believe the answer is:
do porridge
'bank after door locks quietly' is the definition.
I can't judge whether this defines the answer.
'spend time' is the wordplay.
'spend' becomes 'do' (doing is a kind of spending).
'time' becomes 'porridge' (I've seen this before).
'do'+'porridge'='DO PORRIDGE'
'inside' acts as a link.
Can you help me to learn more?
(Other definitions for do porridge that I've seen before include "detained" , "Get time" , "Spend time in prison (colloq.)" .)