Fly with Irish airline, finally one offering exciting descent (7)

'one offering exciting descent' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'fly with irish airline finally' is the wordplay.
'fly' becomes 'zip' (both can mean to move quickly).
'with' becomes 'w' (abbreviation).
'irish' becomes 'IR' (abbreviation).
'finally' indicates one should take the final letters.
The final letter of 'airline' is 'e'.
'zip'+'w'+'ir'+'e'='ZIPWIRE'

Can you help me to learn more?