Atoll gets lads in trouble (6)
I believe the answer is:
island
'atoll' is the definition.
(I've seen this before)
'lads in trouble' is the wordplay.
'trouble' is an anagram indicator.
'lads'+'in'='ladsin'
'ladsin' anagrammed gives 'ISLAND'.
'gets' acts as a link.
(Other definitions for island that I've seen before include "6 Across, for example" , "Eg, Madagascar" , "See 12" , "See 14" , "Piece of land cut off by water" .)