Thank you Ari, Aqer, HelenB, Tony and Peterm. AB's explanations are fine. I just include my own for completion. Thanks for the kind words and glad you had fun. J
1. anag(exceptionally) of “illusedoldgun” – “gold” = UNSULLIED = pure.
2. homophone(taken in) of ‘beret’ = beri. Twice = BERI-BERI = complaint.
3. containment (.... used to keep the .... in) . last of water = R. Stoppers = TAPS. Drums = T(R)APS.
4. Cryptic. leg = STOCKING FILLER = additional present. (it’s in Chambers and the CODict = a small present for a Christmas stocking. In USA = a stocking stuffer). Neither Chambers or C.O.D give (Brit).
5. Charade. mark = TAG. soon = ANON. ink stylograph messiness leads = I S M. friction = AN(TAG)ON + I + S + M