Crossword Genius

An ultra can be wild (7)

Ross

I believe the answer is:

natural

'wild' is the definition.
(synonyms)

'an ultra can be' is the wordplay.
'can be' is an anagram indicator.
'an'+'ultra'='anultra'
'anultra' anagrammed gives 'NATURAL'.

(Other definitions for natural that I've seen before include "Unforced" , "Unvarnished" , "Normal - innate - instinctive" , "Not artificial; off-white" , "Inborn; unaffected" .)

I've seen this clue in The Sun.
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