In retirement, banking assets extremely devalued (6)
I believe the answer is:
abased
'devalued' is the definition.
Although both the answer and definition are past participle verbs, I don't see how one could define the other.
'in retirement banking assets extremely' is the wordplay.
'in retirement' becomes 'abed' (I've seen this before).
'banking' is an insertion indicator.
'extremely' says to hollow out the word (remove centre letters) (only the extremes of the word are used).
'assets' with its middle taken out is 'as'.
'abed' going around 'as' is 'ABASED'.
Can you help me to learn more?
(Other definitions for abased that I've seen before include "Humiliated or degraded" , "Put down" , "Humbled, mortified" , "Demeaned (oneself)" , "Disgraced" .)