Was monarch pelted reportedly? (7)
I believe the answer is:
reigned
'was monarch' is the definition.
(I've seen this before)
'pelted reportedly?' is the wordplay.
'pelted' becomes 'rained'.
'reportedly?' indicates a 'sounds like' (homophone) clue (I've seen 'reportedly' mean this).
'rained' is a homophone of 'REIGNED'.
(Other definitions for reigned that I've seen before include "Ruled" , "Had sovereign power" , "Was king" , "Was monarch" , "Held sway" .)