She needs a heel mended - about time! (5)
I believe the answer is:
ethel
'she' is the definition.
(I've seen this before)
'a heel mended about time' is the wordplay.
'mended' is an anagram indicator.
'about' means one lot of letters goes inside another.
'time' becomes 't' (abbreviation).
'heel' with letters rearranged gives 'ehel'.
'ehel' placed around 't' is 'ETHEL'.
'needs' is the link.
(Other definitions for ethel that I've seen before include "Perhaps a Barrymore" , "Dame - Smyth, Eng. composer, suffragette" , "woman" , "- Merman, US actress" , "chapel" .)