Stupidly lie about and stupidly get caught (6)
I believe the answer is:
nailed
'caught' is the definition.
(I've seen this in another clue)
'stupidly lie about and stupidly' is the wordplay.
'stupidly' indicates anagramming the letters (a stupid ordering of the letters).
'about' means one lot of letters goes inside another.
'stupidly' indicates an anagram (a stupid ordering of the letters).
'lie' is an anagram of 'ile'.
'and' with letters rearranged gives 'nad'.
'ile' going into 'nad' is 'NAILED'.
'get' acts as a link.
(Other definitions for nailed that I've seen before include "Fixed with metal spikes" , "Accomplished" , "Firmly fixed" , "Playful teasing remarks" , "Properly fixed" .)