Talks a bit of rubbish when there are high winds about (7)
I believe the answer is:
gabbles
'talks a bit of rubbish' is the definition.
'gabbles' can be an answer for 'talks' (gabbling is a kind of talking). I'm not sure about the 'a bit of rubbish' bit.
'there are high winds about' is the wordplay.
'there' becomes 'bb' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'are high winds' becomes 'gales' (I've seen this before).
'about' is an insertion indicator.
'bb' put into 'gales' is 'GABBLES'.
'when' acts as a link.
Can you help me to learn more?
(Other definitions for gabbles that I've seen before include "Talks unintelligibly" , "doesn't communicate very well" .)