Things with points, small, lacking point (8)
I believe the answer is:
needless
'lacking point' is the definition.
'things with points small' is the wordplay.
'things with points' becomes 'needles'.
'small' becomes 's' (abbreviation - e.g. clothes size).
'needles'+'s'='NEEDLESS'
(Other definitions for needless that I've seen before include "Lessened, as not required" , "uncalled for" , "Superfluous" , "Excessive" , "Unnecessary, avoidable" .)