Money invested in genuine trimmed light sensor (6)
I believe the answer is:
retina
'light sensor' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
'money invested in genuine trimmed' is the wordplay.
'money' becomes 'tin' (old-fashioned slang term for money).
'invested in' is an insertion indicator.
'genuine' becomes 'real' (associated in meaning).
'trimmed' means to remove the last letter (the last letter is trimmed off).
'real' with its last letter taken off is 'rea'.
'tin' put into 'rea' is 'RETINA'.
Can you help me to learn more?
(Other definitions for retina that I've seen before include "What's behind the humour" , "Viewer's part" , "Membrane covering the back of the eyeball" , "Light-sensitive eye layer" , "Light-sensitive membrane of the eyeball" .)