Crossword Genius

Action taken to back favourites (4)

Ross

I believe the answer is:

step

'action taken' is the definition.

'back favourites' is the wordplay.
'back' is a reversal indicator.
'favourites' becomes 'pets' ('pet' can be a synonym of 'favourite').
'pets' written backwards gives 'STEP'.

'to' acts as a link.

(Other definitions for step that I've seen before include "Abrupt change; pace" , "Put foot on a pest" , "Set foot down on pest" , "Second half of quick 20?" , "Tramp" .)

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