Proper attachments for watering flowers (9)
I believe the answer is:
primroses
'watering flowers' is the definition.
'primroses' can be an answer for 'flowers' (I've seen this before). I am unsure of the 'watering' bit.
'proper attachments' is the wordplay.
'proper' becomes 'prim' (prim and proper).
'attachments' becomes 'roses' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'prim'+'roses'='PRIMROSES'
'for' is the link.
Can you help me to learn more?
(Other definitions for primroses that I've seen before include "plants" , "Promisers or pretty yellow flowers" .)