Clear at this point it's a song (4,5)
I believe the answer is:
over there
'a song' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.
'clear at this point' is the wordplay.
'clear' becomes 'overt' (both can mean apparent or obvious).
'at this point' becomes 'here' (I've seen this before).
'overt'+'here'='OVER THERE'
'it's' acts as a link.
Can you help me to learn more?
(Other definitions for over there that I've seen before include "jingoistic old number" , "Not in this place - yonder" , "not far away" .)