Large amount of people run in tiny underwear (6)
I believe the answer is:
throng
'large amount' is the definition.
(thesaurus)
'people run in tiny underwear' is the wordplay.
I cannot really see how this works, but
'run' could be 'r' (cricket abbreviation) and 'r' is present in the answer.
'underwear' could be 'thong' (I have seen 'Skimpy underwear' mean 'thong' so perhaps 'underwear' could also mean 'thong') and 'thong' is found within the remaining letters.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'of' is the link.
Can you help me to learn more?
(Other definitions for throng that I've seen before include "Come in great numbers" , "Large densely-packed crowd" , "Dense crowd" , "A great crowd of people" , "Press" .)