It will pour out as first engineer finishes top half of fuselage (6)
I believe the answer is:
effuse
'it will pour out' is the definition.
The definition suggests a singular noun but the answer is not.
'first engineer finishes top half of fuselage' is the wordplay.
'first engineer' becomes 'e' (1st letter of 'engineer').
'top' says to take the initial letters.
'half of' means to take half the letters.
The first letter of 'finishes' is 'f'.
'fuselage' halved is 'fuse'.
'e'+'f'+'fuse'='EFFUSE'
'as' is the link.
Can you help me to learn more?
(Other definitions for effuse that I've seen before include "Pour or spread out" , "Pour forth (words)" , "Gush" .)