### Clue: Ancient quiet park bordering hotel is closed by state (11)
### Answer: PREHISTORIC 
 ### Explanation: Definition: Ancient
 [ P(abbrev. for "piano", musical direction to play quietly) + REC(short for a recreation ground;a park) ] **containing**(bordering) [ H(the letter represented by "hotel" in the phonetic alphabet) + IS + TO(towards a closed position, as in "pull the door to") **plus**(by) R.I.(abbrev. for Rhode Island, the US state) ].