Sobbed quietly in the rain (4)
I believe the answer is:
wept
'sobbed' is the definition.
(I've seen this before)
'quietly in the rain' is the wordplay.
'quietly' becomes 'p' (p for piano and quiet).
'in' is an insertion indicator.
'the rain' becomes 'wet' (I've seen this in other clues).
'p' inserted inside 'wet' is 'WEPT'.
(Other definitions for wept that I've seen before include "Shed tears of grief" , ""Jesus ___" (St John's Gospel, xi. 35)" , "lamented" , "Sobbed heavily" , "Was unhappy" .)