Removed head of pointless flower (4)
I believe the answer is:
ouse
'flower' is the definition.
(Yorkshire river)
'removed head of pointless' is the wordplay.
'removed head of' means to remove the first letter.
'pointless' becomes 'nouse' (I've seen this before).
'nouse' with its initial letter removed is 'OUSE'.
(Other definitions for ouse that I've seen before include "River flowing through York" , "Lewes's river" , "Runner" , "bird has lost its tail" , "O, Sue, here is a river" .)