Crossword Genius

Spiv's moment to worry? (5,5)


I believe the answer is:

flash harry

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'spiv's' is the definition.
(I've seen this before)

'moment to worry?' is the wordplay.
'moment' becomes 'flash' (I've seen this before).
'to worry?' becomes 'harry' (I am not sure about this - if you are sure you should believe this answer much more).
'flash'+'harry'='FLASH HARRY'

Can you help me to learn more?

(Other definitions for flash harry that I've seen before include "Show-off" , "wide boy" , "one likes to show off" , "Vulgar type" , "Spiv" .)

I've seen this clue in The Telegraph.
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