Ham and cheese to melt around sandwiches (5)
I believe the answer is:
emote
'ham' is the definition.
(I've seen this before)
'cheese to melt around sandwiches' is the wordplay.
'sandwiches' indicates the answer is hidden within the clue (the solution is sandwiched in by the clue).
'around' is a reversal indicator.
'etome' is hidden within 'cheese to melt'.
'etome' written backwards gives 'EMOTE'.
'and' acts as a link.
(Other definitions for emote that I've seen before include "Behave theatrically" , "'effuse'" , "Show feeling excessively" , "Portray feelings theatrically" , "Go over the top" .)