Casual garment (1-5)

I think it could be either:

Which length description are you looking for?:

1-5

3-5

t-shirt

'casual garment' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for t-shirt that I've seen before include "Informal garment" , "Informal collarless top" , "Light short-sleeved top" , "Simple top" , "Casual upper garment" .)

I've seen this clue in The Telegraph, The Sun and The Times.

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