Oxygen drawn in, a ploy to stimulate the senses (6)
I believe the answer is:
arouse
'stimulate the senses' is the definition.
'arouse' can be an answer for 'stimulate' (synonyms). I'm not sure about the 'the senses' bit.
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for arouse that I've seen before include "excitement" , "Turn on" , "Stimulate or excite" , "Cause to become awake" , "Galvanize" .)