Renovate the pier, please! (7)
I believe the answer is:
prithee
'please' is the definition.
(I've seen this before)
'renovate the pier' is the wordplay.
'renovate' indicates anagramming the letters (I've seen 'renovated' mean this).
'the'+'pier'='thepier'
'thepier' is an anagram of 'PRITHEE'.
(Other definitions for prithee that I've seen before include "Please! (Old English)" , "Old request" , "Please - tip here (anag)" , "Please (archaic)" .)