Expecting to be accompanied by Lee? (4,5)
I believe the answer is:
with child
'expecting' is the definition.
(I've seen this before)
'accompanied by lee?' is the wordplay.
'accompanied by' becomes 'with' (I've seen this in another clue).
'lee?' becomes 'Child' (Lee Child is an author).
'with'+'child'='WITH CHILD'
'to be' acts as a link.
(Other definitions for with child that I've seen before include "Expecting" , "Big-bellied" , "in the club" .)