Flourish every year, getting hit hard (6)

'flourish' is the definition.
(flourish added to a signature)

'every year getting hit hard' is the wordplay.
'every year' becomes 'pa' (per annum).
'getting' means one lot of letters go next to another.
'hit' becomes 'rap' (I've seen this in other clues).
'hard' becomes 'h' (abbreviation used in pencil classifications).
'pa'+'rap'+'h'='PARAPH'