Repeated appeal to host opening of lucky dip (5)
I believe the answer is:
salsa
'dip' is the definition.
(I've seen this before)
'repeated appeal to host opening of lucky' is the wordplay.
'repeated' says to double the letters.
'appeal' becomes 'SA' (old-fashioned abbreviation for sex appeal).
'to host' means one lot of letters goes inside another (inserted letters are hosted or welcomed).
'opening of' indicates taking the first letters.
The initial letter of 'lucky' is 'l'.
'sa' doubled is 'sasa'.
'sasa' enclosing 'l' is 'SALSA'.
(Other definitions for salsa that I've seen before include "Saucy dance" , "that's rather spicy!" , "hot stuff" , "Cuban dance music or spicy sauce" , "Hot dance - hot sauce" .)