A number, for example, finish the inscription (6)
I believe the answer is:
legend
'inscription' is the definition.
(I've seen this before)
'a number for example finish' is the wordplay.
'a number' becomes 'L' (fifty in Roman numerals).
'for example' becomes 'e.g.' (short for 'exempli gratia', 'for example' in Latin).
'finish' becomes 'end' (synonyms).
'l'+'eg'+'end'='LEGEND'
'the' acts as a link.
(Other definitions for legend that I've seen before include "Very famous member's death" , "Former top player" , "Traditional story; caption" , "Caption; very well known" , "The story of Achilles, say" .)