Faces Diana, Al and the head of state (5)

I believe the answer is:

dials

'faces' is the definition.
(dial is a kind of face)

'diana al and the head of state' is the wordplay.
'diana' becomes 'di' (Di is short for Diana).
'and' means one lot of letters go next to another.
'the head of' says to take the initial letters.
The initial letter of 'state' is 's'.
'di'+'al'+'s'='DIALS'

(Another definition for dials that I've seen is " Clock faces".)

I've seen this clue in the Evening Standard.

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