Dig beneath platform (10)
I believe the answer is:
understand
'dig' is the definition.
(I've seen this before)
'beneath platform' is the wordplay.
'beneath' becomes 'under' (I've seen this before).
'platform' becomes 'stand' (stand is a kind of platform**).
'under'+'stand'='UNDERSTAND'
(Other definitions for understand that I've seen before include "Perceive the meaning of" , "Twig" , "Get the message" , "Grasp - sympathise" , "Make sense of" .)