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'm not certain of the 'watering' bit.
'proper attachments' is the wordplay.
'proper' becomes 'prim' (prim and proper).
'attachments' becomes 'roses' (I can't justify this - if you can you should give a lot more credence to this answer).
'prim'+'roses'='PRIMROSES'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for primroses that I've seen before include "plants" , "Promisers or pretty yellow flowers" .)