Wembley's content with minute sign (6)
I believe the answer is:
emblem
'sign' is the definition.
(emblem is a kind of sign)
'wembley's content with minute' is the wordplay.
'content' indicates the central letters.
'with' is a charade indicator (letters next to each other).
'minute' becomes 'm' (abbreviation).
The centre of 'wembley' is 'emble'.
'emble'+'m'='EMBLEM'
(Other definitions for emblem that I've seen before include "Representative object" , "Typifying symbol" , "Mark" , "Symbol; heraldic device" , "Visible symbol of an abstract idea" .)