Ann is inheriting forged Reynolds picture (6,2,3,4)

I believe the answer is:

singin in the rain

I'm a little stuck... Click here to teach me more about this clue!

'reynolds picture' is the definition.
'singin in the rain' can be an answer for 'picture' (a picture as in a film). I am not sure about the 'reynolds' bit.

'ann is inheriting forged' is the wordplay.
'forged' indicates anagramming the letters.
'ann'+'is'+'inheriting'='annisinheriting'
'annisinheriting' with letters rearranged gives 'SINGIN' IN THE RAIN'.

Can you help me to learn more?

I've seen this clue in The Independent.

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