Scruffy new day unit has no answer (6)
I believe the answer is:
untidy
'scruffy' is the definition.
('untidy' can be similar in meaning to 'scruffy')
'new day unit has no answer' is the wordplay.
'new' is an anagram indicator.
'has no' suggests deleting specific letters.
'answer' becomes 'a' (abbreviation eg in Q and A).
'day'+'unit'='dayunit'
'dayunit' with 'a' taken away is 'dyunit'.
'dyunit' is an anagram of 'UNTIDY'.
(Other definitions for untidy that I've seen before include "Far from neat" , "Disorderly, messy" , "missing order" , "Messy, not neat" , "Disorderly, slipshod" .)