Awkward relatives might be able to adapt (9)
I believe the answer is:
versatile
'able to adapt' is the definition.
(I've seen this before)
'awkward relatives' is the wordplay.
'awkward' is an anagram indicator.
'relatives' with letters rearranged gives 'VERSATILE'.
'might be' acts as a link.
(Other definitions for versatile that I've seen before include "Having many uses" , "Adaptable sort of relatives" , "variable" , "Good at adapting oneself" , "Capable of many functions" .)