Ballpoint (4)
'ballpoint' is the definition.
(synonyms)
This is all the clue.
(Other definitions for biro that I've seen before include "Type of ballpoint pen" , "Lazlo -, ballpoint pen inventor" , "Writing implement" , "writer" , "Laszlo Jozsef -, ballpoint pen inventor" .)
'ballpoint' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for pen that I've seen before include "Confine the writer" , "Small enclosure" , "International writers's organisation" , "Put down" , "See 20" .)