Delicacy, father, and limberness are required for it (9)
I believe the answer is:
fragility
'delicacy' is the definition.
(I know that delicacy can be written as fragility)
'father and limberness are required for it' is the wordplay.
I cannot really understand how this works, but
'father' could be 'fra' and 'fra' is present in the answer.
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is located 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" .)