MINOR SPOILERS For all the inevitable chrysalis transformation of singer Ally (Lady Gaga) during A Star is Born (2018, directed by Bradley Cooper), the most subtle, yet real sartorial reflection of character belongs to her mentor and lover Jack (Cooper). Costumed by Erin Benach (Drive, A Place Beyond the Pines), Jack is the epitome of the casual rock star. Stage wear, day wear, evening wear, drinking wear, sleeping wear – it’s all the same. His simple clothes mask a mind so damaged it can only be subdued with the bottle. Jack lives in t-shirts (plain, dark or neutral colours), untucked shirts (dark or a green graph-check), brown calf leather jacket,…