Does tar at sea notice possible place for anchorage? (9)
I believe the answer is:
roadstead
'possible place for anchorage?' is the definition.
(roadstead can mean a place for ships to anchor)
'does tar at sea notice' is the wordplay.
'at sea' indicates anagramming the letters.
'notice' becomes 'ad' (short for advert).
'does'+'tar'='doestar'
'doestar' anagrammed gives 'roadste'.
'roadste'+'ad'='ROADSTEAD'
(Other definitions for roadstead that I've seen before include "anchorage" , "Sheltered stretch of water for anchoring ships" , "Sheltered spot where ships may ride at anchor" .)