Flier to wait, having lost heart as orbital traveller (9)
I believe the answer is:
planetary
'flier to wait having lost heart as orbital traveller' is the definition.
I can't judge whether this definition defines the answer.
'flier to wait having lost heart' is the wordplay.
'flier' becomes 'plane' (planes fly).
'to wait' becomes 'tarry' (to tarry is to wait or linger).
'having lost heart' suggests removing the centre.
'tarry' with its middle removed is 'tary'.
'plane'+'tary'='PLANETARY'
Can you help me to learn more?
(Other definitions for planetary that I've seen before include "Of any heavenly body moving round the sun" , "Of Mars and Uranus, say" , "Relating to bodies in the solar system" .)