Risk little noggin, finally, in the interval (7)
I believe the answer is:
between
'in the interval' is the definition.
(I've seen this in another clue)
'risk little noggin finally' is the wordplay.
'risk' becomes 'bet' (I've seen this in another clue).
'little' becomes 'wee' (similar in meaning).
'finally' suggests the final letters.
The last letter of 'noggin' is 'n'.
'bet'+'wee'+'n'='BETWEEN'
(Other definitions for between that I've seen before include "Amid" , "Separating (two things)" , "Been wet (anag.)" , "In the middle (of)" , "In the space separating two objects" .)