Flying saucers make a fool of us (4)

I believe the answer is:

ufos

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'flying saucers' is the definition.
(unidentified flying objects)

'a fool of us' is the wordplay.
'of us' can be anagrammed to 'UFOS'.
Though, I'm unsure how the anagram is indicated.

'make' is the link.

Can you help me to learn more?

(Other definitions for ufos that I've seen before include "Initially, official flying saucers" , "Supposed alien craft" , "Roswell sightings?" , "Mysterious things" , "Unauthorised traffic from outer space?" .)

I've seen this clue in The Irish Times.

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