Clean and healthy account about start of month (7)
I believe the answer is:
aseptic
'clean and healthy' is the definition.
(aseptic means uncontaminated)
'account about start of month' is the wordplay.
I cannot really understand how this works, but
'about' could be 'c' (abbreviation for 'circa') and 'c' is found within the answer.
'month' could be 'sept' (Sept is an example) and 'sept' is found in the answer.
The remaining letters 'ai' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
(Other definitions for aseptic that I've seen before include "Free from bacteria, surically clean" , "Germ-free" , "Spicate (anag.)" , "avoiding germs" , "Sterile" .)