21d Cork replaced with bits of early Turkish carpeting (6) ROCK?T - Word play produces ROCKET but where's the carpeting?
28d Feeling vexed when cha's off? Don't look so miserable (4) ?RIN - Probably GRIN but why?
Note Chambers Dictionary is recommended.
Stuck on 6 down (probably gone wrong elsewhere!) -If prime suffers and concretion follows, this can cause termination (12). I have MI?E?RI?SOME. Help, please!