Delicacy, father, and limberness are required for it (9)
I believe the answer is:
fragility
'delicacy' is the definition.
(synonyms)
'father and limberness are required for it' is the wordplay.
I cannot really see how this works, but
'father' could be 'fra' and 'fra' is located in the answer.
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for fragility that I've seen before include "Delicacy" , "weakness" , "quality of eggshell" , "Breakable quality" , "Brittleness" .)