Jenny longed to hold hose? (5)
I believe the answer is:
nylon
'hose?' is the definition.
(I've seen this before)
'jenny longed to hold' is the wordplay.
'to hold' says the answer is hidden in the clue (I've seen 'holding' mean this).
'NYLON' is hidden within 'jenny longed'.
(Other definitions for nylon that I've seen before include "Artificial fibre" , "Artificial fabric" , "may be damaged by running" , "Fibrous material" , "Yarn for stockings" .)