Crossword Genius

Pet butterfly? (6)

Ross

I believe the answer is:

stroke

I believe this clue is a double definition.

'pet' is the first definition.
(I've seen this before)

'butterfly?' is the second definition.
(butterfly stroke is a swimming stroke)

(Other definitions for stroke that I've seen before include "Blow - gentle touch - brain damage" , "Manner of swimming - caress with hand" , "Brain haemorrhage or caress" , "Medical seizure - effect of sun - oarsman" , "A blow or brain seizure" .)

I've seen this clue in The Times and The Telegraph.
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