Description of lob used for tennis (5,7)

I believe the answer is:

mixed doubles

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

'description of lob used' is the wordplay.
'description' becomes 'mixed' (I am not sure about this - if you are sure you should believe this answer much more).
'of' indicates an anagram (the answer comes from or 'of' the letters).
'lob'+'used'='lobused'
'lobused' anagrammed gives 'doubles'.
'mixed'+'doubles'='MIXED DOUBLES'

'for' is the link.

Can you help me to learn more?

(Other definitions for mixed doubles that I've seen before include "shorts?" , "tennis match?" , "Tennis for ladies and gents" , "Range of big shots" , "His 'n' hers tennis" .)

I've seen this clue in The Independent.

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