Obtained the money as I floundered in the red (6)
I believe the answer is:
raised
'obtained the money' is the definition.
The definition and answer can be both related to change as well as being past participle verbs.
Maybe you can see an association between them that I don't see?
'as i floundered in the red' is the wordplay.
'floundered' is an anagram indicator (I've seen 'flounder' mean this).
'in' indicates putting letters inside.
'as'+'i'='asi'
'asi' anagrammed gives 'ais'.
'ais' inserted inside 'red' is 'RAISED'.
Can you help me to learn more?
(Other definitions for raised that I've seen before include "Erected" , "Collected for a purpose" , "Brought up or collected for cause" , "Grew" , "Reared" .)