Huge flier off course, rare bird on course? (9,9)

'huge flier' is the definition.
'wandering albatross' can be an answer for 'flier' (wandering albatross is a kind of birdanimal). I am unsure of the 'huge' bit.

'course rare bird on course?' is the wordplay.
I cannot quite see how this works, but
'course' could be 'w' and 'w' is found within the answer.
'rare' could be 'r' (listed by Oxford Dictionary of Abbreviations) and 'r' is present in the answer.
'bird' could be 'albatross' (albatross is a kind of bird) and 'albatross' is located in the answer.
'course?' could be 'n' and 'n' is located in the answer.
This explanation may well be incorrect...

'off' is the link.

Can you help me to learn more?