Development, say, around transport hub (9)
I believe the answer is:
gestation
'development' is the definition.
(I've seen this before)
'say around transport hub' is the wordplay.
'say' becomes 'eg'.
'around' is a reversal indicator.
'transport hub' becomes 'station' (I can't justify this - if you can you should give a lot more credence to this answer).
'eg' back-to-front is 'ge'.
'ge'+'station'='GESTATION'
Can you help me to learn more?
(Other definitions for gestation that I've seen before include "Development over time" , "Development (in womb)" , "Development of plan" , "as before being transported by coach" , "Period of development" .)