Doctor getting terribly fit at club? Rubbish (9)
I believe the answer is:
driftwood
'rubbish' is the definition.
The answer and definition can be both substances as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'doctor getting terribly fit at club?' is the wordplay.
'doctor' becomes 'dr' ('Dr' can be a synonym of 'doctor').
'getting' means one lot of letters go next to another.
'terribly' is an anagram indicator.
'at club?' becomes 'wood' (I can't explain this - if you can you should give a lot more credence to this answer).
'fit' with letters rearranged gives 'ift'.
'dr'+'ift'+'wood'='DRIFTWOOD'
Can you help me to learn more?
(Other definitions for driftwood that I've seen before include "Timber washed up by sea" , "Timber, etc, on the sea" , "found washed up on a beach?" , "Flotsam" , "Timber washed ashore" .)