Dog around London area shows what retriever does? (7)
I believe the answer is:
recover
'what retriever does?' is the definition.
I can't tell whether this definition defines the answer.
'dog around london area' is the wordplay.
'dog' becomes 'rover' (Rover is a common name for a pet dog).
'around' is an insertion indicator.
'london area' becomes 'ec' (I can't justify this - if you can you should give a lot more credence to this answer).
'rover' enclosing 'ec' is 'RECOVER'.
'shows' is the link.
Can you help me to learn more?
(Other definitions for recover that I've seen before include "Get better - get back" , "Bring back" , "Obtain the return of" , "Get better; retrieve" , "Regain" .)