Batting with no indication of time, completely overwhelmed (9)
I believe the answer is:
inundated
'completely overwhelmed' is the definition.
'inundated' can be an answer for 'overwhelmed' (thesaurus). I am not certain of the 'completely' bit.
'batting with no indication of' is the wordplay.
'batting' becomes 'in'.
'with no indication of' becomes 'undated' (I can't justify this - if you can you should believe this answer much more).
'in'+'undated'='INUNDATED'
'time' is the link.
Can you help me to learn more?
(Other definitions for inundated that I've seen before include "flooded" , "drowned" , "Deluged" .)