Overlooked foxtrot got tenor dancing (9)
I believe the answer is:
forgotten
'overlooked' is the definition.
(I've seen this before)
'foxtrot got tenor dancing' is the wordplay.
'foxtrot' becomes 'f' (phonetic alphabet: alpha, bravo, charlie etc.).
'dancing' indicates an anagram.
'got'+'tenor'='gottenor'
'gottenor' anagrammed gives 'orgotten'.
'f'+'orgotten'='FORGOTTEN'
(Other definitions for forgotten that I've seen before include "Overlooked" , "left behind" , "Disregarded" , "Unremembered" , "Gone from memory" .)