Tasteless shirt cut off by Georgia (6)
I believe the answer is:
garish
'tasteless' is the definition.
(similar in meaning)
'shirt cut off by georgia' is the wordplay.
'cut' means to remove the last letter.
'off' indicates an anagram.
'by' is a charade indicator (letters next to each other).
'georgia' becomes 'GA' (abbreviation).
'shirt' with its last letter taken off is 'shir'.
'shir' with letters rearranged gives 'rish'.
'rish' after 'ga' is 'GARISH'.
(Other definitions for garish that I've seen before include "Hag, sir, could be gaudy" , "Gaudy, excessively bright" , "in bright colours" , "Cheap, flash" , "Gaudy, lurid" .)