To get anywhere he must push himself forward (7)
I believe the answer is:
cyclist
'to get anywhere he must push himself forward' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'to get anywhere he' is the wordplay.
I cannot quite see how this works, but
'he' could be 'cy' and 'cy' is found within the answer.
The remaining letters 'clist' 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 cyclist that I've seen before include "(Two-wheeled) rider" , "Bike rider" , "He rides a two-wheeled vehicle" , "One on a bike" , "Sportsperson on two wheels" .)