Polish a line for the appendix? (8)
I believe the answer is:
glossary
'the appendix?' is the definition.
(I've seen this before)
'polish a line' is the wordplay.
I cannot really understand how this works, but
'polish' could be 'gloss' (synonyms) and 'gloss' is located in the answer.
'a' is present in the answer.
'line' could be 'ry' (abbreviation for railway) and 'ry' is present in the answer.
No letters remain.
This explanation may well be incorrect...
'for' acts as a link.
Can you help me to learn more?
(Other definitions for glossary that I've seen before include "List of terms used in a particular subject" , "Explanation of words" , "where terms are laid out" , "List of words pertaining to a subject" , "List of technical words with definitions" .)