Crossword Genius

Top dog on the phone? (4)

Ross

I believe the answer is:

peak

'top' is the definition.
(synonyms)

'dog on the phone?' is the wordplay.
'dog' becomes 'peke' (short for Pekingese).
'on the phone?' indicates a 'sounds like' (homophone) clue (I've seen 'on the phone' mean this).
'peke' sounds like 'PEAK'.

(Other definitions for peak that I've seen before include "Part of cap; mountain" , "Mountain top" , "Acme" , "High point" , "Pinnacle" .)

I've seen this clue in The Telegraph.
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