Tearful, my Rachel, so distraught (10)
I believe the answer is:
lachrymose
'tearful' is the definition.
(I know that tearful can be written as lachrymose)
'my rachel so distraught' is the wordplay.
'distraught' indicates an anagram (an unsettled or upset order of the letters).
'my'+'rachel'+'so'='myrachelso'
'myrachelso' with letters rearranged gives 'LACHRYMOSE'.
(Other definitions for lachrymose that I've seen before include "In bits" , "Sad" , "Tearful (literary)" , "Weepy" , "This is given to crying" .)