Many racing cyclists speed ahead, drinking nothing (7)
I believe the answer is:
peloton
'many racing' is the definition.
I know nothing about this answer so I cannot judge whether this works.
'cyclists speed ahead drinking nothing' is the wordplay.
'cyclists speed' becomes 'pelt' (I can't explain this - if you can you should give a lot more credence to this answer).
'ahead' becomes 'on' (synonyms).
'drinking' means one lot of letters goes inside another.
'nothing' becomes 'O' (looks like zero - 0).
'pelt'+'on'='pelton'
'pelton' enclosing 'o' is 'PELOTON'.
Can you help me to learn more?
(Other definitions for peloton that I've seen before include "bunch of riders" , "Main pack of cyclists in a race" , "Main packed group in a cycle race" , "Racing cyclists" , "cyclists in bunch" .)