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 the' means one lot of letters goes inside another.
'rain' becomes 'wet' (I've seen this in other clues).
'p' placed within '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" .)