Crossword Genius

Tell sir to change framework (7)

Ross

I believe the answer is:

trellis

'framework' is the definition.
(I know that trellis is a type of fretwork)

'tell sir to change' is the wordplay.
'to change' is an anagram indicator.
'tell'+'sir'='tellsir'
'tellsir' anagrammed gives 'TRELLIS'.

(Other definitions for trellis that I've seen before include "Train for plants" , "Garden frame or screen" , "Framework supporting climbers" , "Garden climbing frame" , "latticework in the garden" .)

I've seen this clue in The Sun.
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