Financial fellows follow me back to the first levee (10)
I believe the answer is:
embankment
'levee' is the definition.
(I know that levee can be written as embankment)
'financial fellows follow me back to the' is the wordplay.
'financial' becomes 'bank' (I am not sure about this - if you are sure you should believe this answer much more).
'fellows' becomes 'men' (fellow can mean a man).
'follow' means one lot of letters go next to another.
'back' is a reversal indicator.
'to the' becomes 't' (the is pronounced as a 't' sound in some dialects).
'me' written backwards gives 'em'.
'bank'+'men'='bankmen'
'bankmen' after 'em' is 'embankmen'.
'embankmen'+'t'='EMBANKMENT'
'first' acts as a link.
Can you help me to learn more?
(Other definitions for embankment that I've seen before include "Flood wall" , "protection against rising liquidity" , "Mound" , "Riverside wall" , "Needle here" .)