When made to go, set out for central Greenwich (4)
I believe the answer is:
sent
'when made to go' is the definition.
I can't tell whether this definition defines the answer.
'out for central greenwich' is the wordplay.
'out' indicates putting letters inside.
'for' becomes 'set' (I can't explain this - if you can you should give a lot more credence to this answer).
'central' indicates the central letters.
The centre of 'greenwich' is 'n'.
'set' going around 'n' is 'SENT'.
'set' acts as a link.
Can you help me to learn more?
(Other definitions for sent that I've seen before include "Despatched" , "Noiseless" , "Transmitted" , "charged with emotion?" , "Shipped" .)