Identity needed to enter sporting occasion? That is obvious (7)
I believe the answer is:
evident
'is obvious' is the definition.
(similar in meaning)
'identity needed to enter sporting occasion?' is the wordplay.
'identity' becomes 'id' (abbreviation).
'needed to enter' is an insertion indicator.
'sporting occasion?' becomes 'event' (eg athletics events).
'id' inserted into 'event' is 'EVIDENT'.
'that' acts as a link.
(Other definitions for evident that I've seen before include "Noticeable" , "Plain to see" , "Clear to see" , "Quite obvious and clear" , "on display" .)