Crossword Genius

Small top, say (5)

Ross

I believe the answer is:

speak

'say' is the definition.
(thesaurus)

'small top' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'top' becomes 'peak' (I've seen this before).
's'+'peak'='SPEAK'

(Other definitions for speak that I've seen before include "Converse" , "Talk" , "Say something" , "express" , "Utter words" .)

I've seen this clue in The Independent.
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