Hellish doomed ship: appeal to replace it after turning turtle (7)
I believe the answer is:
satanic
'hellish' is the definition.
(synonyms)
'doomed ship appeal to replace it after turning turtle' is the wordplay.
I cannot really understand how this works, but
'appeal' could be 'sa' (old-fashioned abbreviation for sex appeal) and 'sa' is located in the answer.
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for satanic that I've seen before include "Devil-like" , "Supremely evil" , "Bad" , "Devilish (as Blake's 18)" , "Nick's" .)