I'd boil uncontrollably with desire (6)
I believe the answer is:
libido
'desire' is the definition.
(libido is a kind of desire)
'i'd boil uncontrollably' is the wordplay.
'uncontrollably' indicates an anagram (I've seen this in other clues).
'id'+'boil'='idboil'
'idboil' with letters rearranged gives 'LIBIDO'.
'with' acts as a link.
(Other definitions for libido that I've seen before include "Life force" , "Sexual impulse" , "Freud's sex drive" , "Emotional energy associated with sexual desire" , "Psychic, sexual, energy" .)