Oldster tailored clothes — a set of exercise clothes (8)

I believe the answer is:

leotards

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'set of exercise clothes' is the definition.
I know nothing about this answer so I can't tell whether this works.

'oldster tailored clothes a' is the wordplay.
'tailored' indicates anagramming the letters (the letters are customised ).
'clothes' means one lot of letters goes inside another.
'oldster' is an anagram of 'leotrds'.
'leotrds' enclosing 'a' is 'LEOTARDS'.

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(Other definitions for leotards that I've seen before include "Clothing for acrobats" , "Theatrical attire" , "Garments for gymnasts" , "One-piece ballet garments" , "Garments worn by dancers" .)

I've seen this clue in The Hindu.

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