Interlude centres on ship-mate push (6)
I believe the answer is:
hiatus
'interlude' is the definition.
(thesaurus)
'centres on ship-mate push' is the wordplay.
I cannot quite understand how this works, but
'on' could be 'at' (I've seen this in other clues) and 'at' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for hiatus that I've seen before include "Opening" , "Break, interruption" , "A break or gap in series or sequence" , "Gap, interruption" , "Brief respite" .)