Hear one wren getting agitated miles away (7,4)
I believe the answer is:
nowhere near
'miles away' is the definition.
(I've seen this before)
'hear one wren getting agitated' is the wordplay.
'getting agitated' indicates anagramming the letters.
'hear'+'one'+'wren'='hearonewren'
'hearonewren' with letters rearranged gives 'NOWHERE NEAR'.
(Other definitions for nowhere near that I've seen before include "Far from it" , "Far-out" , "Miles away" .)