Crossword Genius

Sid signed off, getting dizzy spells (9)

Ross

I believe the answer is:

giddiness

'getting dizzy spells' is the definition.
(getting dizzy or giddy)

'sid signed off' is the wordplay.
'off' indicates anagramming the letters.
'sid'+'signed'='sidsigned'
'sidsigned' is an anagram of 'GIDDINESS'.

(Other definitions for giddiness that I've seen before include "State of excitable frivolity" , "Vertigo" , "Excitability and frivolity" .)

I've seen this clue in The Telegraph.
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