Books about prophet revised once as signs at a crossing (7,7)

I believe the answer is:

belisha beacons

'signs at a crossing' is the definition.
(Belisha beacon is a type of traffic beacon)

'books about prophet revised once as' is the wordplay.
'books' becomes 'bb' (two abbreviations for book).
'about' means one lot of letters goes inside another.
'prophet' becomes 'elisha' (Hebrew prophet).
'revised' indicates an anagram.
'bb' going around 'elisha' is 'belishab'.
'once'+'as'='onceas'
'onceas' is an anagram of 'eacons'.
'belishab'+'eacons'='BELISHA BEACONS'

I've seen this clue in The Guardian.

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