Wad of banknotes or maybe fifty pounds (4)

I believe the answer is:

roll

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'wad of banknotes' is the definition.
'roll' can be an answer for 'wad' (thesaurus). I am not sure about the 'of banknotes' bit.

'or maybe fifty pounds' is the wordplay.
'maybe' indicates anagramming the letters.
'fifty' becomes 'l' ('L' can be a synonym of 'fifty').
'pounds' becomes 'l' (L can represent the monetary pound).
'or' with letters rearranged gives 'ro'.
'ro'+'l'+'l'='ROLL'

Can you help me to learn more?

(Other definitions for roll that I've seen before include "Go over and over" , "Drums sound" , "Gymnastic move; bread" , "Move by turning over" , "Register - for continental breakfast?" .)

I've seen this clue in the Evening Standard.

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