Weekend Ft

[HenHen]

18d- sex in single file voluntarily given up (4,4) - L??????? - laid down???
21ac - resort forever wanting energy to get measure of twist (6) - T????? - tangle?
19d - waste of n2? (8) - ???????? - 2nd letter G if tangle correct
20d - grammatical unit feeling heartless (8) - ???????? - 2nd letter is E if tangle correct

Help appreciated, with explanations
Thanks
HenHen

[bibblebub]

18d: love life
21a: torque = torqu(ay) + e
19d: squander
20d) sentence

[bibblebub]

forgot about the explanations:-

18d: reversed inside ...singlE FILE VOLuntarily...
19d) anagram of n squared[i
20d) remove the middle letter of [i]sentience]

[HenHen]

Thanks BB. For the 2nd week running you've come up trumps!!

[bibblebub]

because the crossword is free online, i've had the time this morning to solve it