Dicky guards the family members (9)
I believe the answer is:
daughters
'family members' is the definition.
(daughter is a type of relative)
'dicky guards the' is the wordplay.
'dicky' is an anagram indicator (dicky can mean ill or non-functioning).
'guards'+'the'='guardsthe'
'guardsthe' is an anagram of 'DAUGHTERS'.
(Other definitions for daughters that I've seen before include "The guards turn out to be relatives" , "Female offspring" .)