Ambassadors from Spain fail to spot sign (10)

I believe the answer is:

emissaries

'ambassadors' is the definition.

'spain fail to spot sign' is the wordplay.
'spain' becomes 'e' (abbreviation for Espana).
'fail to spot' becomes 'miss'.
'sign' becomes 'aries' (star sign).
'e'+'miss'+'aries'='EMISSARIES'

'from' acts as a link.

(Another definition for emissaries that I've seen is " Agents".)

I've seen this clue in The Guardian.

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