Assembled legators, or one offering fortune (10)

I believe the answer is:

astrologer

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'one offering fortune' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.

'assembled legators or' is the wordplay.
'assembled' is an anagram indicator.
'legators'+'or'='legatorsor'
'legatorsor' anagrammed gives 'ASTROLOGER'.

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(Other definitions for astrologer that I've seen before include "One who reads the stars" , "Compiler of star charts" , "Maker of horoscopes" , "Horoscopist" , "One interpreting the stars' movement" .)

I've seen this clue in The Telegraph.

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