Have a siesta, then shower? Check! (8)
I believe the answer is:
restrain
'have' is the definition.
(thesaurus)
'a siesta then shower? check' is the wordplay.
I cannot really understand how this works, but
'a' is within the answer.
'siesta' could be 'rest' (I've seen this in another clue) and 'rest' is present in the answer.
'shower?' could be 'rin' (I've seen this in another clue) and 'rin' is present in the remaining letters.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for restrain that I've seen before include "use handcuffs?" , "Arrest - confine - subdue" , "Manacle" , "stay" , "In arrest (anagram)" .)