Crossword Genius

Belts or elastic support (7)

Ross

I believe the answer is:

bolster

'support' is the definition.
(synonyms)

'belts or elastic' is the wordplay.
'elastic' indicates anagramming the letters (the anagram stretches or twists into a new form).
'belts'+'or'='beltsor'
'beltsor' anagrammed gives 'BOLSTER'.

(Other definitions for bolster that I've seen before include "support for head after retiring" , "Shore up" , "Support; long pillow" , "Long thick pillow" , "Chisel - long cushion" .)

I've seen this clue in The Times.
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