Set one’s sights on a pyramidal structure (6)
I believe the answer is:
aspire
'set one's sights' is the definition.
(I've seen this in another clue)
'a pyramidal structure' is the wordplay.
I cannot quite see how this works, but
'a' is within the answer.
'structure' could be 'spire' (spire is a kind of structure) and 'spire' is present in the answer.
No letters remain.
This may be the basis of clue (or it may be nonsense).
'on' is the link.
Can you help me to learn more?
(Other definitions for aspire that I've seen before include "Have a strong desire to achieve something" , "Aim, shoot for" , "Yearn, dream (towards)" , "Have hopes (to achieve something)" , "Aim (for higher things)" .)