Have a look around for some of the ingredients served up in cheesecake (3)
I believe the answer is:
see
'have' is the definition.
(thesaurus)
'up in cheesecake' is the wordplay.
'up' is a reversal indicator (in down clue: letters go upwards).
'in' indicates a hidden word.
'ees' is hidden within 'cheesecake'.
'ees' reversed gives 'SEE'.
'a look around for some of the ingredients served' is the link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for see that I've seen before include "Observe the papacy in Rome" , "Realize" , "Receive" , "Glimpse; get" , "Perceive mentally" .)