Ring first over satellite (8)

I believe the answer is:

callisto

'satellite' is the definition.
(I know that Callisto is Galilean)

'ring first over' is the wordplay.
'ring' becomes 'call' (call on the phone).
'first' becomes 'ist' (ist resembles 1st).
'over' becomes 'o' (cricket abbreviation).
'call'+'ist'+'o'='CALLISTO'

(Other definitions for callisto that I've seen before include "satellite" , "Female reformed to bear" , "nymph revealing > heavenly body" , "moon of Jupiter" .)

I've seen this clue in The Times.

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