Clashes with crook getting 100 in darts (9)

'clashes' is the definition.
(clash can mean a conflict or confrontation)

'crook getting 100 in darts' is the wordplay.
'crook' becomes 'con' ().
'getting' says to put letters next to each other.
'c00' becomes 'c' (Roman numeral).
'in' indicates putting letters inside.
'darts' becomes 'flits' ('flit' can be a synonym of 'dart').
'c' put inside 'flits' is 'flicts'.
'con'+'flicts'='CONFLICTS'

'with' is the link.