Old-fashioned garb for TT? (7)
I believe the answer is:
doublet
'old-fashioned garb' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?
I can't explain the remainder of the clue.
(Other definitions for doublet that I've seen before include "would be seen in battle" , "Pairing" , "Historical jacket" , "Old garment worn with hose" , "Pair of similar things" .)