Daughter seen by family members is intimidating (6)
I believe the answer is:
daunts
'is intimidating' is the definition.
'daughter seen by family members' is the wordplay.
'daughter' becomes 'd' (genealogical abbreviation).
'seen by' means one lot of letters go next to another.
'family members' becomes 'aunts' (I've seen this in another clue).
'd'+'aunts'='DAUNTS'
(Other definitions for daunts that I've seen before include "Frightens or discourages" , "Makes afraid or discouraged" , "Cows" , "intimidates" .)