Telephone's heavy breather? (6)

I believe the answer is:

blower

I believe this clue is a double definition.

'telephone's' is the first definition.
(blower can informally mean the telephone)

'heavy breather?' is the second definition.
(someone who blows)

(Other definitions for blower that I've seen before include "Fan; telephone (colloq.)" , "Telephone (informal)" , "Fan - telephone (slang)" , "Fan - phone" , "Air mover; telephone" .)

I've seen this clue in The Independent.

Want a hint initially instead of a full solution? Install my app