Daughter came down exhausted (7)
I believe the answer is:
drained
'exhausted' is the definition.
(draining is a kind of exhausting)
'daughter came down' is the wordplay.
'daughter' becomes 'd'.
'came down' becomes 'rained' (raining is a kind of coming down).
'd'+'rained'='DRAINED'
(Other definitions for drained that I've seen before include "Exhausted" , "empty" , "spent" , "Deprived of strength" , "Tired" .)