TV presenter from part of London blocking mature response (7)
I believe the answer is:
riposte
'response' is the definition.
(I know that riposte is a type of response)
'tv presenter from part of london blocking mature' is the wordplay.
I cannot really see how this works, but
'from' could be 'o' (I've seen this in other clues) and 'o' is found in the answer.
'part' could be 'te' (te is a kind of part) and 'te' is found within the answer.
The remaining letters 'rips' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for riposte that I've seen before include "Quick answer" , "Snappy comeback" , "Rejoinder" , "Reply, retort" , "Smart reply" .)