Family spook finally producing sound of chains? (5)
I believe the answer is:
clank
'sound of chains?' is the definition.
(I've seen this in another clue)
'family spook finally' is the wordplay.
'family' becomes 'clan' (clan can mean a large family).
'finally' suggests the final letters.
The final letter of 'spook' is 'k'.
'clan'+'k'='CLANK'
'producing' acts as a link.
(Other definitions for clank that I've seen before include "Loud metallic noise" , "Harsh metallic sound" .)