Help appreciated with wordplay for these.....
45a Traveller full of ideas first to leave about now (12) - REPRESENTATIVE
20d Almost laugh uncontrollably about test for officers (9) - CORPORALS
I can see 'Oral' for test and 'Corps' for 'Officers' but just don't get 'Almost laugh'.
29d Shallow northern river - jump across it (4,4) - SKIN DEEP
It's N(orthern) DEE (River) = SKID but I'm having difficulty finding where 'Jump' and 'Skid' could be used in the others place.
40d Party skirt and cool top sported by an islander (9) - DOMINICAN
I get 'Party' = DO + 'Dress' = MINI, but why is CAN a 'Cool top' and not just a 'Top'?