Crossword Genius

An element of pressure over revised shop hours (10)

Ross

I believe the answer is:

phosphorus

'an element' is the definition.
(I know that phosphorus is a type of element)

'pressure over revised shop hours' is the wordplay.
'pressure' becomes 'p' (scientific abbreviation).
'over' means one lot of letters go next to another (in a down clue, some letters go over others).
'revised' indicates anagramming the letters.
'shop'+'hours'='shophours'
'shophours' with letters rearranged gives 'hosphorus'.
'p'+'hosphorus'='PHOSPHORUS'

'of' is the link.

(Other definitions for phosphorus that I've seen before include "It lights" , "Element, symbol P" , "Flammable illuminating material" , "Combustible element" , "Element used in making matches" .)

I've seen this clue in The Guardian.
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