More polished interpretation? That is right (8)

I believe the answer is:

glossier

'more polished' is the definition.
('glossy' can be similar in meaning to 'polished')

'interpretation? that is right' is the wordplay.
'interpretation?' becomes 'gloss'.
'that is' becomes 'ie' (short for Latin 'id est', 'that is').
'right' becomes 'r' (common abbreviation).
'gloss'+'ie'+'r'='GLOSSIER'

I've seen this clue in The Daily Mail.

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