Class times for George? (6)
I believe the answer is:
formby
'george?' is the definition.
(ukulele player George Formby)
'class times' is the wordplay.
'class' becomes 'form' (synonyms).
'times' becomes 'by' (both can mean 'multiplied by').
'form'+'by'='FORMBY'
'for' is the link.
(Other definitions for formby that I've seen before include "Lancashire town or comedian" , "George, comedian, 1904-61" , "George -, twentieth century ukelele singer" , "George --, English singer and ukulele player" .)