Flexible relatives all over the place (9)
I believe the answer is:
versatile
'flexible' is the definition.
('versatile' can be similar in meaning to 'flexible')
'relatives all over the place' is the wordplay.
'all over the place' is an anagram indicator.
'relatives' with letters rearranged gives 'VERSATILE'.
(Other definitions for versatile that I've seen before include "Multi-talented" , "Multifaceted" , "Adaptable like relatives" , "Flexible" , "Resourceful; relatives (anag.)" .)