Lacking polish, hag takes cue erroneously. (6)

I believe the answer is:

gauche

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'lacking polish' is the definition.
Although both the answer and definition are adjectives, I cannot understand how one could define the other.

'hag takes cue erroneously' is the wordplay.
'takes' is a charade indicator (letters next to each other).
'erroneously' indicates an anagram.
'hag'+'cue'='hagcue'
'hagcue' with letters rearranged gives 'GAUCHE'.

Can you help me to learn more?

(Other definitions for gauche that I've seen before include "Tactless - blundering" , "Lacking grace" , "Raw and naive" , "Like maladroit people" , "Awkward, inept" .)

I've seen this clue in The Irish Times.

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