Writer providing life story about queen (4)
I believe the answer is:
biro
'writer' is the definition.
(I've seen this before)
'life story about queen' is the wordplay.
'life story' becomes 'bio' (short for biography).
'about' is an insertion indicator.
'queen' becomes 'r' (r is abbreviation regina. e.g. in ER ).
'bio' going around 'r' is 'BIRO'.
'providing' is the link.
(Other definitions for biro that I've seen before include "writer" , "Lazlo -, ballpoint pen inventor" , "Pocket item" , "Laszlo Jozsef -, ballpoint pen inventor" , "Type of ballpoint pen" .)