Pauls excited, meeting radios first star (6)
I believe the answer is:
pulsar
'star' is the definition.
(I know that pulsar is a type of neutron star)
'pauls excited meeting radios first' is the wordplay.
'excited' indicates an anagram.
'meeting' says to put letters next to each other.
'radios first' becomes 'r' (1st letter of 'radios').
'pauls' anagrammed gives 'pulsa'.
'pulsa'+'r'='PULSAR'
(Other definitions for pulsar that I've seen before include "A source of space of radio signals" , "Small and extremely dense star" , "Radio-emitting star" , "Heavenly emitter of radio waves" , "Rapidly rotating star, emitting electromagnetic waves very quickly" .)