Cloth, perhaps, for renovation of FBI car (6)
I believe the answer is:
fabric
'cloth' is the definition.
(synonyms)
'of fbi car' is the wordplay.
'of' indicates an anagram (the answer comes from or 'of' the letters).
'fbi'+'car'='fbicar'
'fbicar' is an anagram of 'FABRIC'.
'perhaps for renovation' acts as a link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for fabric that I've seen before include "Perhaps felt" , "Material in general" , "Woven, knitted or felted cloth" , "Material; structure" , "Knitted or woven fabric" .)