Submit a story about Birkenhead (5)
I believe the answer is:
table
'submit' is the definition.
(thesaurus)
'a story about birkenhead' is the wordplay.
'a story' becomes 'tale' ('tale' can be a synonym of 'story').
'about' indicates putting letters inside.
'birkenhead' becomes 'b' (head letter of 'birken').
'tale' placed around 'b' is 'TABLE'.
(Other definitions for table that I've seen before include "Array of figures" , "Array of data" , "Working, eating, surface" , "Board; data list" , "Set of figures in columns" .)