Nice trait, but somehow puzzling (9)

I believe the answer is:

intricate

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

'puzzling' is the definition.
(I've seen this before)

'nice trait but somehow' is the wordplay.
'nice trait' anagrams to 'INTRICATE'.
But, I am not clear how this is indicated.

Can you help me to learn more?

(Other definitions for intricate that I've seen before include "Entangled" , "Convoluted" , "Very complicated and involved" , "ornate" , "puzzlingly obscure" .)

I've seen this clue in The Irish News.

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