Perhaps Stairway to Heaven second last for Apollo Zeppelin gig (4)
I believe the answer is:
song
'perhaps stairway to heaven' is the definition.
I can't judge whether this defines the answer.
'second last for apollo zeppelin gig' is the wordplay.
'second' becomes 's' (common abbreviation).
'last for' suggests the final letters.
The final letters of 'apollo zeppelin gig' are 'ong'.
's'+'ong'='SONG'
Can you help me to learn more?
(Other definitions for song that I've seen before include "Piece of music, usually with words" , "Something recorded by 26 [FACES] , for example" , "Ditty" , "Musical number" , "Ballad, aria" .)