Long and yellow, with no tail (5)
I believe the answer is:
crave
'long' is the definition.
(thesaurus)
'yellow with no tail' is the wordplay.
'yellow' becomes 'craven' (I've seen this before).
'with no tail' means to remove the last letter.
'craven' with its final letter removed is 'CRAVE'.
'and' acts as a link.
(Other definitions for crave that I've seen before include "Long for, desire" , "Feel a powerful desire for (something)" , "Yearn for (something)" , "Desperately desire" , "Have strong desire for, or beg as for mercy" .)