Baldness, surprisingly, has point – but it’s dull (9)

'it's dull' is the definition.
I can't judge whether this definition defines the answer.

'baldness surprisingly has point' is the wordplay.
'surprisingly' is an anagram indicator (a surprising ordering of the letters).
'has' is an insertion indicator.
'point' becomes 'n' (North).
'baldness' with letters rearranged gives 'blandess'.
'blandess' going around 'n' is 'BLANDNESS'.

'but' acts as a link.

Can you help me to learn more?