Observer getting excited, tweeting French word that comes up (7,3)
I believe the answer is:
peeping tom
'observer getting excited tweeting french word that comes up' is the definition.
'Peeping Tom' can be an answer for 'observer' (Peeping Tom is an example). I'm not sure about the remainder of the definition.
'tweeting french word that comes up' is the wordplay.
'tweeting' becomes 'peeping' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'french word' becomes 'mot' (I've seen this in another clue).
'that comes up' says the letters should be written in reverse (in a down clue, letters go up).
'mot' backwards is 'tom'.
'peeping'+'tom'='PEEPING TOM'
Can you help me to learn more?
(Other definitions for peeping tom that I've seen before include "One who spies pruriently on others" , "Voyeur" , "who likes looking at females" , "Spy" .)