Towards back seat repaired by sailors (6)
I believe the answer is:
astern
'towards back' is the definition.
I can't judge whether this defines the answer.
'seat repaired by sailors' is the wordplay.
'repaired' indicates an anagram.
'by' is a charade indicator (letters next to each other).
'sailors' becomes 'RN' (abbreviation for Royal Navy).
'seat' anagrammed gives 'aste'.
'aste'+'rn'='ASTERN'
Can you help me to learn more?
(Other definitions for astern that I've seen before include "following behind vessel" , "Behind at sea" , "Aft" , "Ran set (anag.)" , "Towards the rear of boat" .)