Crossword Genius

Juliet had little Margaret make this image (4)

Ross

I believe the answer is:

jpeg

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'this image' is the definition.
The definition suggests a singular noun which matches the answer.

'juliet had little margaret' is the wordplay.
'juliet' becomes 'J' (phonetic alphabet: alpha, bravo, charlie etc.).
'had' is a charade indicator (letters next to each other).
'little margaret' becomes 'peg' (I've seen this in another clue).
'j'+'peg'='JPEG'

'make' acts as a link.

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I've seen this clue in The Irish Times.
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