Change rota in order to provide support for shift? (10)

I believe the answer is:

coathanger

'support for shift?' is the definition.
(a shift might be hung on a hanger )

'change rota in order' is the wordplay.
'in order' is an anagram indicator (the letters in a new order).
'change'+'rota'='changerota'
'changerota' anagrammed gives 'COATHANGER'.

'to provide' acts as a link.

(Another definition for coathanger that I've seen is " Curved piece of wood with a hook in a wardrobe".)

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