Crossword Genius

Deputy's also scrummy occasionally (5)

Ross

I believe the answer is:

locum

'deputy's' is the definition.
(I've seen this before)

'also scrummy occasionally' is the wordplay.
'occasionally' means one should take alternating letters.
'also'+'scrummy'='alsoscrummy'
The alternate letters of 'alsoscrummy' are 'LOCUM'.

(Other definitions for locum that I've seen before include "Doctor's stand-in" , "Stand-in professional" , "Temporary substitute" , "Stand-in physician" , "One stands in" .)

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