Monitor, up in the air, repositioned playpens? (8)

I believe the answer is:

spyplane

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'monitor' is the definition.
(I've seen this before)

'repositioned playpens?' is the wordplay.
'repositioned' is an anagram indicator.
'playpens' anagrammed gives 'SPYPLANE'.

'up in the air' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.

Can you help me to learn more?

(Other definitions for spyplane that I've seen before include "that might provide enemy location" , "Monitor" .)

I've seen this clue in The Telegraph.

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