Last sandwich in very pleasant recess (5)
I believe the answer is:
niche
'recess' is the definition.
(I know that recess can be written as niche)
'last sandwich in very pleasant' is the wordplay.
'last' says to take the final letters.
'in' indicates putting letters inside.
'very pleasant' becomes 'nice' (associated in meaning. I am not sure about the 'very' bit.).
The final letter of 'sandwich' is 'h'.
'h' placed within 'nice' is 'NICHE'.
Can you help me to learn more?
(Other definitions for niche that I've seen before include "Cosy corner?" , "Chine (anag) - suitable place in life" , "Specialised corner of the market" , "Nook, cranny" , "Specialized market" .)