One-eyed fan can copy league sides? (9)

I believe the answer is:

cyclopean

I'm a little stuck... Click here to teach me more about this clue!

'one-eyed' is the definition.
Although both the answer and definition are adjectives, I cannot see how one could define the other.

'fan can copy league sides?' is the wordplay.
'fan' indicates an anagram (letters must be fanned around).
'sides?' suggests removing the centre (I've seen 'sides' mean this (only the letters on the sides are used)).
'league' with its centre taken out is 'le'.
'can'+'copy'+'le'='cancopyle'
'cancopyle' is an anagram of 'CYCLOPEAN'.

Can you help me to learn more?

(Other definitions for cyclopean that I've seen before include "Massive" , "Style of construction" .)

I've seen this clue in the Sydney Morning Herald.

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