Wrecked piers to establish again (7)
I believe the answer is:
reposit
'establish again' is the definition.
I can't tell whether this definition defines the answer.
'wrecked piers to' is the wordplay.
'wrecked' is an anagram indicator.
'piers'+'to'='piersto'
'piersto' with letters rearranged gives 'REPOSIT'.
Can you help me to learn more?
(Other definitions for reposit that I've seen before include "Lay away" , "store" .)