Australian city, bold and hard (5)
I believe the answer is:
perth
'australian city' is the definition.
(I've seen this in another clue)
'bold and hard' is the wordplay.
'bold' becomes 'pert' (I've seen this in another clue).
'and' means one lot of letters go next to another.
'hard' becomes 'h' (abbreviation used in pencil classifications).
'pert'+'h'='PERTH'
(Other definitions for perth that I've seen before include "Home of fair maid" , "Western Australia's capital" , "Period (of effort)" , "Scottish/Australian city" , "Australian or Scottish city" .)